Free Essay

Emerging Technology: Agricultural and Animal Waste to Energy

In: Miscellaneous

Submitted By terrybartley
Words 8663
Pages 35
Kathleen Cimino, Kimberly Andros, Teresa Bartley


University of Maryland University College

Spring 2009 Table of Contents
1.0 Introduction
1.1 Waste to energy definition/history/uses
1.2 Agricultural / Animal waste production
1.3 Graph, chart, quantities produced in United States, etc..
2.0 Conversion of w2e
2.1 Conversion Pathways
2.1.1 Thermochemical
2.1.2 Biochemical
2.1.3 Physico-chemical
2.2 Factors affecting energy recovery
3.0 Agricultural Residue
3.1 Introduction to residue
3.2 What is it
3.3 Where is it produced
3.4 What is role in environment
3.4.1 Environmental risks
3.4.2 Health risks
3.5 Conversion of agricultural residue to energy
3.5.1 Process
3.5.2 Risks
3.5.3 Benefits
3.5.4 Future as energy source
4.0 Animal Wastes
4.1 Introduction to animal waste
4.2 What is animal waste comprised of
4.3 Where is it produced
4.4 What is its role in environment
4.4.1 Environmental risks
4.4.2 Health risks

Table of Contents (Cont’d)

4.5 Conversion of animal waste to energy
4.5.1 Process
4.5.2 Risks
4.5.3 Benefits
4.5.4 Future as Energy source
5.0 Processes/Regulations/Technology
5.1 Availability of w2e facilities, costs
5.2 Technological benefits/risks
5.2.1 Other information on technology of w2e, production, transportation, environmental implications
5.3 Regulation governing w2e
6.0 Recommendations
6.1 Policy recommendations/guidelines
6.2 Future benefits
7.0 Conclusion
7.1 Summarize w2e: Movement of agricultural residue/animal waste from waste stream to energy, reduction of environmental/health risks. Future of w2e.
8.0 Works Cited



1.0 Introduction
1.1 Waste to energy definition/history/uses With today’s unpredictable petroleum prices and Federal policies targeting a reduction in U.S dependency on oil imports and extenuating climate change, a demand for Bioenergy has been sparked. In response to this demand, production of agricultural commodities (biomass) that serve as feedstock for Bioenergy has increased. Biomass consists of all plant and plant-derived organic materials including dedicated energy crops and trees, agricultural food and feed crops, agricultural crop wastes and residues, wood wastes and residues, aquatic plants, animal wastes, municipal wastes, and other waste materials. It provides America an excellent prospect for using a domestic and sustainable resource for fuel, power, and chemical needs now and for the future. More appropriately, biomass energy is the solar energy stored in organic matter than man can convert to electricity or fuel. The sustainable utilization of this energy in the Bioenergy cycle imitates the Earth’s ecological cycles and reduces air, river, and ocean pollutants. Most of the carbon needed to create Bioenergy is taken from the atmosphere and then later returned to it. The nutrients required to create it are taken from the soil and then also returned to the soil. The remains from one part of the cycle form the inputs to the next step in the cycle. It is a cyclic process for continual natural and clean energy.

(Bioenergy Feedstock Information Network, 2008)
This paper focuses on two particular feedstock for Bioenergy, agriculture residue and animal waste. Agricultural residues are the non-edible remnants remaining after the harvesting of a variety of field crops. They can consist of straw, stalks, stubble, husks and cobs (Stover), wheat mids, shells, Nuts, Skins and Hulls, Switchgrass, Miscanthus, Grape, Olive and fruit Pomace and Cotton Gin. Animal waste consists of manure and litter from cow, swine, poultry, turkey, sheep, and lamb, and Dairy Washdown. The most appropriate energy conversion technologies and handling protocols for the different types of residues and waste will vary depending on their moisture content. Dry residues include the part of arable crops not intended for producing food, feed, or fiber including straw, corn Stover, and poultry litter. Wet residues/wastes are those that have high water content at collection, including animal slurry and barnyard manure. A reduction in the moisture content may be required to achieve its intended purpose in energy applications. The Biomass can be dried before and after harvesting and even harvested for reduced moisture. Biomass energy, which can be used for fuels, power, and production, is not a new concept. It was been around since people began burning wood to cook food and keep warm. Before the industrial revolution biomass fulfilled nearly all of our energy needs and until the 1860’s the U.S used biomass for nearly 91% of all energy consumption (AES, 2008). In the late 1970’s following an era of high inflation and scarce energy, Congress enacted the Public Utility Regulatory Policies Act (PURPA) in an effort to diversify and strengthen domestic energy production (CBEA, 2008). Following this development a brand new leg of the biomass industry emerged and the first small plants began producing electricity in the eighties. Tax incentives of the late 1970’s and early 1980’s also supported the production of commercial scaled digesters using livestock manure as feedstock for energy production. These new Bioenergy plants initially used combusted wood waste to generate electricity instead of non-renewable fuels like coal, petroleum and natural gas. As the facilities evolved they begin to use forest thinings, agricultural byproducts, orchard removals, and urban wood waste as feedstock for electricity. Using these feedstock, reduced the risk of wildfire in forests, avoided a lot of open burning and conserved landfill space. Before being used as feedstock, agricultural residues were traditionally disposed of by open-field burning which was very inefficient and highly polluting, especially fine particulate matter (a pollutant of significant health concern). Livestock waste, before being used as feedstock, would be left to decompose and produce large amounts of methane gas and carbon dioxide that would pollute the air and nearby water. Thankfully today, more agricultural residue and animal waste are being used to its fullest natural energy potential to create different forms of Bioenergy. These include:
• Biomass power is electricity produced from biomass fuels created from agricultural residues and gaseous fuels produced from animal wastes. Biopower technologies convert renewable biomass fuels into electricity and heat by using modern boilers, gasifiers, turbines, generators, and fuel cells (U.S Department of Energy, 2008).
• Liquid fuel (cellulosic ethanol from agricultural residues and biodiesel from animal fats) that substitutes for petroleum products such as gas and diesel. The Energy Independence and Security Act (EISA) of 2007 included provisions for a Renewable Fuel Standard (RFS) to increase the supply of alternative fuel sources by requiring fuel producers to use at least 36 billion gallons of biofuel by 2022. The RFS provisions established a level of 15 billion gallons of convenetional ethanol by 2015 and at least 21 billion gallons of cellulosic ethanol and advanced biofuels (biodiesel) by 2022 (Aillery & Malcolm, 2009)
• Anaerobic digestion (AD) is a biological process in which biodegradable organic matters (animal waste such as manure) are broken-down by bacteria into biogas consisting of methane (CH4), carbon dioxide (CO2) and other trace amounts of gases. The biogas can then be used to generate heat and electricity. The success of the AD is dependent on temperature, moisture and nutrient contents, pH, and oxygen-free.

(U.S Department of Energy, 2008)
• Bioproducts can be created by converting biomass into chemicals for making plastics and other products that would typically be made from petroleum.
1.2 Agricultural / Animal waste production The U.S Department of Energy (DOE) and the U.S Department of Agriculture (USDA) are strongly dedicated to expanding the role of biomass energy. They see the role of biomass energy as a way reduce the need for oil and gas imports; to support the growth of agriculture, forestry, and rural economies; and to foster major new domestic industries (biorefineries) that will make a variety of fuels, chemicals and other products (Oak Ridge National Laboratory, 2005). DOE and USDA has predicting a 30% replacement of the current U.S petroleum consumption with biofuels by 2030. Biomass, which has the greatest potential to provide renewable energy for America’s future, is the largest domestic source of renewable energy and currently provides over 3% of the total energy consumption in the U.S. Biomass is also the only current renewable source of liquid transportation fuel. Currently the ethanol industry, including conventional and cellulosic, saves the U.S about $2 billion a year in oil imports, benefits farm incomes by about $4.5 billion and employs about 200,000 people. Once new large-scale Bioenergy and biorefinery industries are constructed and completely resourceful these numbers will increase. Currently agricultural lands can produce nearly 1 billion dry tons of biomass annually and still continue to meet food, feed, and export demands (Oak Ridge National Laboratory, 2005). This includes 428 million dry tons of annual crop residues and 106 million dry tons of animal manures, process residues, and other miscellaneous feedstocks.
1.3 Graph, chart, quantities produced in United States, etc..
Biomass Technology Chart
Technology Conversion Process Type Major Biomass Feedstock Energy or Fuel Produced
Direct Combustion
Thermochemical Wood agricultural waste municipal solid waste residential fuel heat steam electricity
Thermochemical wood agricultural waste municipal solid waste low or medium-Btu producer gas
Technology Conversion Process Type Major Biomass Feedstock Energy or Fuel Produced
Thermochemical wood agricultural waste municipal solid waste synthetic fuel oil (biocrude) charcoal Anaerobic Digestion
(anaerobic) animal manure agricultural waste landfills wastewater medium Btu gas (methane)
Ethanol Production
(aerobic) sugar or starch crops wood waste pulp sludge grass straw ethanol
Biodiesel Production
Chemical rapeseed soy beans waste vegetable oil animal fats biodiesel
Methanol Production
Thermochemical wood agricultural waste municipal solid waste methanol

2.0 Conversion of Waste to Energy
2.1 Conversion Pathways
There are three main pathways for conversion of organic waste material to energy – thermochemical, biochemical and physicochemical. These various process transfer wastes into useable fuels, reducing environmental impacts of wastes, and the burden waste puts on landfills and other waste management systems. Although source reduction is an important method of limiting waste production, the following process transform waste into useable products, or eliminate the need for further disposal. Thermochemical, biochemical, and physiochemical processes provide fuels, electricity and products from solid waste, ultimately aiding in the management of solid waste and providing alternatives to landfill methods.
2.1.1 Thermochemical
Although combustion of waste has been used for many years as a way of reducing waste volume and neutralizing many of the potentially harmful elements within it. Combustion can only be used to create an energy source when heat recovery is included. Heat recovered from the combustion process can then be used to either power turbines for electricity generation or to provide direct heating. Thermochemical conversion is characterized by higher temperatures and conversion rates and includes combustion pryolosis, and gasificiation. Both pryolosis and gasification are alternatives to incineration and transform waste into gas and fuels for future energy use.
Combustion – Combustion is a process that reduces wastes volume through simultaneous mass and heat transport. During this process, waste is treated at extremely high temperatures. The composition of the waste determines the nature of its emissions; however, burning waste at extremely high temperatures destroys chemical compounds and disease-causing bacteria (U.S. EPA, 2008 Wastes). Systems can convert water into steam for fuel to generate electricity. Refuse derived fuel (RDF), recovers recyclables then continues incineration. About ten percent of the total ash formed in the combustion process is used for beneficial use such as daily cover in landfills and road construction (U.S. EPA, 2008 Wastes).
Pyrolysis– Pyrolysis is a form of incineration that chemically decomposes organic materials by heat in the absence of oxygen. Materials are transformed into gases, small amounts of liquid as well as carbon and ash. Pyrolysis has many benefits including: reduction of material weight and volume, reduction of bad odors, and increased handling capability.
Gasificiation – In gasification, materials (such as coal, petroleum, biofuel or biomass) are converted into carbon monoxide and hydrogen to produce fuel. The gasification can turn low value feedstocks into high valued products such as fertilizers, liquid fuels, or hydrogen (Gasification Technologies Council, 2008). There are many benefits to gasification. First, gasification produces lower quantities of criteria air pollutants than other thermochemical processes. Gasification also reduces the impact of waste disposal, ultimately generating products from otherwise disposed wastes. Similarly, gasification results in non-hazardous products and lower water usage. Modifications in design of gasification facilities can recycle water and capture carbon dioxide as well (Gasification Technologies Council, 2008).
2.1.2 Biochemical
The bio-chemical conversion processes, which include anaerobic digestion and fermentation, are preferred for wastes having high percentage of organic biodegradable matter and high moisture content.
Anaerobic - Anaerobic digestion is optimal for the treatment of wet, organic waste. The process is conducted without oxygen and results in a fuel gas called biogas containing mostly methane and carbon dioxide. The produced biogas can be used for engines, gas turbines, boilers, and in the manufacturing of chemicals biogas can be used for engines, gas turbines, fuel cells, boilers, industrial heaters, other processes, and the manufacturing of chemicals (Williams, Jenkins, & Nguyen, 2003).
Fermentation - Although similar to anaerobic digestion in that oxygen is absence in the process, fermentation produces different produces. Fermentation transfers organic constituents to ethanol through biochemical reactions utilizing specialized microorganisms. Byproducts of fermentation are typically used as boiler fuel or in thermochemical conversion to other fuels and products (Williams, et al., 2003).
Aerobic – Aerobic conversion uses air or oxygen to induce the metabolism of aerobic microorganisms. Aerobic conversion operates at higher speeds than fermentation and anaerobic digestion; however, gas fuels are generally not produced from the process. Both composting and activated sludge wastewater treatment processes are examples of aerobic conversion.
2.1.3 Physico-chemical
The physico-chemical technology involves various processes to transform physical and chemical properties of solid waste. In the physicochemical conversion process fresh or used vegetable oils, animal fats, greases and other feedstocks are converted into liquid fuels or biodesiel. Similarly, the combustible fraction of the waste is converted into high-energy fuel and may be used in steam generation. This process results in products with lower ash and moisture contents and uniform size. Physicochemical conversion is both cost-effective, and environmentally friendly.
2.2 Factors affecting energy recovery
There are two important factors to consider when determining the potential of energy products from wastes. Both quantity and quality of waste are important factors in determining potential of useable products from waste. The following are parameters that determine both quality and quantity of wastes:
• Size of constituents
• Density
• Moisture content
• Volatile solids / Organic matter
• Fixed carbon 3.0 Agricultural Residue
3.1 Introduction to residue One of the greatest environmental threats of the 21st century is a continual reduction in global biodiversity. Coupled with concerns about the security and sustainability of fossil fuel and its uses, there is a renewed interest in crop residue as a biofuel to help meet our energy needs.
3.2 What is it Agricultural residue is a renewable, sustainable, and expandable resource capable of meeting the growing demand for Bioenergy and transportation fuel. It is derived from the fibrous, inedible portions of field crops that are left over after harvest. The most abundant and readily available primary agricultural crop residues are corn Stover (leaves, stalks and cobs) and wheat straw. Out of the 500 million tons of crop residues produced each year, there is a sustainable potential of 75 million dry tons of corn Stover and about 11 million dry tons of wheat straw. Corn tends to receive the most attention because it has a concentrated area of production and produces 1.7 times more residue than other leading cereals when based on current production levels (USDA, 2006). Other high residue crops include rice and sugarcane. While agricultural residues are used as feedstock for different uses, it primary purpose is the production of cellulosic ethanol. Cellulose is the core section in the cell wall of plants, and is the main structural material in the plants. This type of material is in general less expensive than corn (conventional ethanol) but is harder to convert to sugar. Ethanol, which is grain alcohol, is produced by fermenting and distilling simple sugars from biological sources. It is actually the same type of alcohol found in alcoholic beverages but commercial ethanol plants add about 2-5 % of poison to make it unfit for human consumption (Morris & Hill, 2006). Cellulose is chemically made up of a long chain of tightly bound sugar molecules. Although the refining process (converting to sugar) is more complex than traditional ethanol, cellulosic ethanol yields a greater net energy benefit and the production results in much lower greenhouse gas emissions. The conversion of cellulose to sugar will be explained in a later section.
3.3 Where is it produced Most residue recovery processes pick up residue left on the ground after the primary (edible) crops have been harvested. This process involves multiple passes of equipment over the fields and removes an average of 40% corn Stover and straw. Because agricultural residue is a byproduct of the harvesting of field crops, it will be concentrated in areas of high harvest. Because corn is the major contributor for residue, most of the Stover supply (62%) comes from the three major corn-producing states: Iowa, Minnesota, and Illinois (Graham, 2007). Supplies of Stover also come from Nebraska, which is another major producer of corn, but due to high wind erosion less residue is able to be collected. Areas suitable for the collection of large quantities of Stover collection include central Illinois and Indiana, northern Iowa, southern Minnesota, and along the Platte River in Nebraska (Graham, 2005). These areas are particularly suitable for residue removal because of high corn yields; the topography is flat, and irrigated. Conservation tillage, which is mulch, or no-till, is used in 22% of the central Illinois and Indiana land, 29% of the land in Iowa and Minnesota, and 61% in Nebraska (Graham, 2005). Once removed, agricultural residues are transported to ethanol production plants that convert the residue into cellulosic ethanol. As of 2001, there were over 60 ethanol production plants either in operation or under construction (Oak Ridge National Laboratory, 2001). These plants have the capacity to produce more than 2 billion gallons a year. They are located in 20 states concentrated within the Midwest. 22 of these plants were farm-owned facilities.

Annual production of corn Stover in the United States. Values were derived using 1995–2000 corn production statistics from USDA. (Graham, 2005) 3.4 What is role in environment
3.4.1 Environmental risks Agricultural residues provide a physical buffer for soil by protecting it from the direct impacts of rain, wind and sunlight. This leads to improved soil structure, reduced soil temperature and evaporation, increased infiltration, and reduced runoff and erosion. Crop residue also contributes to soil organic matter and nutrient increases, water retention, and microbial and Macroinvertebrates (USDA, 2006). The effects of which lead to improved plant growth and increased soil productivity and crop yield. The primary consideration for using the residues is maintaining the productivity of the soil where the crops are grown. Agricultural residue is managed using conservation tillage systems including, no-till, strip till, ridge till, mulch till, and other reduced tillage methods. A 30% covering of crop residue over soil after harvesting can reduce soil erosion from water and wind by 50-75% (Oregon’s Biomass Energy Resources, ).
The amount of residue needed for control of erosion it dependent on soil type and variations in slope length and steepness. Therefore the amount of agricultural residue available as a biomass energy resource will be limited to the amount of residue that is not needed to remain to maintain soil productivity. If no-till practices were universally accepted, the total amount of collectable residue supply could potentially increase to 101.2 million tons. Even with no tillage practices almost 50 % of agricultural residue would need to remain uncollected to conserve the health of the soil.
3.4.2 Health risks There are two potential risks to health: ethanol plant accidents like explosions and exposure to pollution. There is the potential for exposure to polluted water if the agricultural residue is over collected resulting in soil erosion allowing agriculture runoff to make it into nearby waterways.
3.5 Conversion of agricultural residue to energy
3.5.1 Process
The edible portions of corn and other grains are easily fermented into ethanol because there chemical makeup is abundant with starches (which are easily converted into sugar). Cellulosic matter, on the other hand, consists of hard fibrous cellulose and lignin (the skeleton of the plant) which must first be converted into starches before it can be fermented (converted to sugar). The cellulose goes through pretreatment methods to be broken down into its component sugar in two ways. Pretreatment refers to the solubilization and separation of one or more of the four major components of biomass: hemicelluloses, cellulose, lignin, and extractive. This pretreatment makes the remaining solid biomass more accessible to further chemical or biological treatment. The two pretreatment methods are:
1) Treat it with chemicals including dilute acid, alkaline, organic solvent, ammonia, sulfur dioxide, carbon dioxide or other chemicals to make the biomass more digestible by enzymes.
2) Treat it with enzymes. The enzymes work by breaking the chemical bonds between molecules. Once the molecules are separated into simple sugars they are more accessible to yeast and other microbes that then ferment the sugars to ethanol or other Bioenergy.

3.5.2 Risks As previously stated, the harvesting of cellulosic feedstock poses environmental challenges in the since that crop residue removal needs to be done carefully, leaving enough residues in place to reduce erosion and returning enough residues to the soil to maintain or improve organic matter content.
3.5.3 Benefits There are many benefits for converting agricultural residue into energy. These benefits include:
• The same residues that are being used for feedstock can often be burned to fuel the ethanol plant avoiding extra fuel expenses.
• The substitution of cellulosic ethanol for gasoline would result in a net greenhouse reduction of 86-128 %, compared to a 35% reduction if corn ethanol was substituted (Oak Ridge National Laboratory, 2001).
• Cellulosic feedstock prices have the potential to be more stable and less volatile than corn prices.
• Cellulosic ethanol plants can dispose of a wide variety of organic wastes.
• With fully developed biomass ethanol technology, Bioenergy from agriculture could displace 25 -30 % of U.S petroleum imports.
• In combination with better vehicle efficiency, smart-growth urban planning, and biofuel, the U.S demand for gasoline could be practically eliminated.
• Ethanol production from corn stover could result in $8.9 billion in industrial output and $3.8 billion in value added. It could also create about 76,000 permanent jobs (Oak Ridge National Laboratory, 2001).
• According to a USDA study, a 100 million gallons/year ethanol production facility would create 2250 local jobs for a single community (Oak Ridge National Laboratory, 2001).
• Substituting biofuels for one gallon of gasoline/diesel saves 20lbs of carbon dioxide emissions to the atmosphere (Oak Ridge National Laboratory, 2001).

3.5.4 Future as energy source While agricultural residue as a feedstock will not be able to completely replace fossils fuels for transportation and electricity, the diversity of this feedstock will allow the U.S to increase its energy independence. The U.S is making great strides toward that goal. In 2007, the DOE announced that it would invest up to $385 million for six biorefinery projects over the course of four years. Once these biorefineries are fully operational, they will be expected to produce more than 130 million gallons of cellulosic ethanol per year (DOE, 2007). Former President Bush’s announced a goal of making cellulosic ethanol cost-competitive with gasoline by 2012, and along with increased automobile fuel efficiency, reducing America’s gasoline consumption by 20% in ten years (DOE, 2007). Former President Bush’s Twenty in Ten Initiative aims to increase the use of renewable and alternative fuels in the transportation sector to the equivalent of 35 billion gallons of ethanol a year by 2017. Funding for these projects will lead to the wide-scale use of non-food based biomass, like agricultural residue, in the production of transportation fuels, electricity, and other products (DOE 2007).

4.0 Animal Waste
4.1 Introduction to animal waste Animal wastes includes livestock and poultry manure, bedding and liter, dairy parlor waste water, feedlot runoff, silage juices from trench silos, and wasted feed. (Hammond, 1994) The waste also comes from water that has contacted animal manure, litter, or bedding; water from washing, flushing, or cleaning animal pens; and liquid or solid waste from pens used at kennels, animal hospitals, poultry processing facilities, dairies or rendering plants. . ( Approximately two trillion pounds of animal waste are produced per year nationally. Common animal waste treatment practices used in agriculture and farming are often inadequate to protect the environment producing a major pollution problems in the nation. This large volume of waste cannot be assimilated by natural processes so treatment is required. Waste is pumped into open air pits called lagoons then the liquid manure is sprayed onto fields at volumes that exceed what the crops can take up, leaving a large amount to be released into the air or runoff into surface waters. (Scorecard, 2005) Emerging technologies have since been developed to combat these pollution problems. Transformation of waste to energy is one of the best options to make use of waste and to get rid of waste. Modern methods of purification means there is no emission of toxic waste. (Alvarez, 2008.) The process of using anaerobic digesters to breakdown animal waste for energy will be discussed in detail in section 4.5. The first farm based digesters were introduced in the US in the 1970’s. A major problem getting started was the need for large capital investment. Energy prices at that time were down so the technology to turn animal waste into useable energy was not pursued by many farmers. Today the technology is funded through state grant money and renewable energy credits in the private market. (Bogo, 2009)
4.2 What is animal waste comprised of? Animal waste is made up of nutrients such as Nitrogen and Phosphorus, organic matter, pathogens, heavy metals, hormones, antibiotics, and ammonia. (EPA, 2009)
Animal waste can effect water, soil, and air quality if not properly handled and treated. The waste can be a valuable resource for farmers and the environment if managed correctly. It could reduce the need for commercial fertilizers, improve soil tilth, and supply power to run the farms. (Hammond, 1994)
4.3 Where is it produced?
Animal waste is produced on dairy farms, pig farms, poultry farms, raw and composted feed lots, sheep farms, and cattle ranches across the nation. The majority of waste is produced in the central portion of the United States from Texas to Minnesota and also includes California and North Carolina (See Figure 2.0 ) (Scorecard, 2005)
Figure 2.0 Animal Waste Levels Among States

4.4 What is its role in environment?
4.4.1 Environmental risks
One of the biggest water quality problems today is from non point source pollution. Point source pollution is any pollution that is discharged from the end of a pipe (i.e., factories and sewage treatment plants); non point source (NPS) pollution is any pollution that does not come from the end of a pipe (i.e., agricultural runoff, fertilizer runoff from lawns, and construction site runoff). Current farming practices often result in the release of sediment, fertilizers, pesticides and animal waste into local water bodies. (Scorecard, 2005) The added nutrients from the waste (nitrogen and phosphorus) produce excessive algal blooms causing an unpleasant taste and odor. (Hammond, 1997) When the algae die off the bacteria responsible for decomposition consumes all the dissolved oxygen in the water resulting in there not being enough oxygen left for fish, crabs and other aquatic life to breathe. (Scorecard, 2005)
Another environmental risk caused by animal waste is an increase in greenhouse gases into the atmosphere. Animal manure produces naturally occurring methane that if not captured is released into the air. (Hammond, 1997) Livestock produces 9 percent of human-induced carbon dioxide (CO2); 37 percent of all human-induced methane (CH4); and 64 percent of ammonia, which is tied to acid rain. It also generates 65 percent of human-induced nitrous oxide (N20), which the FAO says has 296 times the global warming potential of CO2. (Oliver, 2008)
Animal waste also has a negative affect on soil. The manure increases the soils pH making it difficult to produce a decent crop yield. A waste management and nutrient management plan is needed as part of the total soil and water conservation plans for farms producing livestock and poultry. Soil and waste testing is done in order to match the crop needs to the nutrients available. (Hammond, 1997)
4.4.2 Health risks
Improper collection and disposal of untreated animal waste can harm groundwater and human health. Nutrients and bacteria from animal waste can cause contamination of drinking water supplies; fish kills; and harm shellfish in contaminated water bodies. (Hammond, 1997) Dangerous and offensive odors and other air pollutants are emitted making air quality harmful for neighbors especially the very young and the elderly. Antibiotics used on factory farms to compensate for unsanitary growing conditions and promote slightly faster livestock growth develop into an antibiotic resistant strain of bacteria in animal waste. (Scorecard, 2005)
4.5 Conversion of animal waste to energy
4.5.1 Process
The featured processes being tested and used to convert animal waste into useable energy are anaerobic digestion and thermo chemical conversion technology [combustion, gasification, and pyrolysis].
Anaerobic digestion is the most widely used technology to convert animal waste to energy. Farms in Pennsylvania (PA), Nebraska (NE), Wisconsin (WI), Vermont (VT), California (CA), Texas (TX), and Oklahoma (OK), just to name a few have begun to use this technology. (Stevanus, 1998) Anaerobic digesters transform more than 8 million gallons for manure and waste water into electricity, bedding, fertilizer, and heating fuel each year. (Bogo, 2009) A good example of how anaerobic digestion works is at a farm in Rockwall, PA. On the farm sits an outbuilding, inside the outbuilding there is a 19,000 gallon holding tank that mixes cow manure and wastewater slurry. Manure is low energy since it already has been digested once by the cows so high energy food waste is added to the mix to help aid the process. The slurry goes into the digester where anaerobic bacteria breakdown organic matter producing Biogas consisting of approximately 65% methane. The gas fills a 12 inch air space and is piped into a 40 ft diameter (17,000 cu ft capacity) rubberized bladder which then is feed into a natural gas caterpillar engine that runs a 130 kilowatt generator. The system is capable of producing 1.2 million kilowatt-hours (kwh) of electricity. This is enough power to supply heat and hot water to the farm and nearby homes generating a savings of more then $60,000 yearly. The unused energy is sold to the local utility at 2.3 cents per kwh. (Bogo, 2009)
On the same lines as anaerobic digestion is the use of thermochemical conversion technology which can be used to generate bioenergy from manure.
Combustion is a subset of thermochemical conversion technology and is used to convert poultry waste into useable energy. Fibrominn, a power plant in Benson, Minnesota is currently using this technology to provide power the plant and approximately 50,000 homes. The waste used is from Confined Animal Feeding Operations (CAFOs), turkey farms in Minnesota. 1.7 million tons of turkey litter is produced annually. Its traditional use was for fertilizers for fields and crops. An alternative solution for disposing the waste is to turn it into power. Half a million tons of poultry waste is combusted annually to produced 55 mega watts of renewable energy. 3,000 tons of turkey waste is trucked daily to a storage facility for the plant, which can hold up to 10,000 tons at one time. The smell is intense, causes your eyes to burn, and can remain in clothing for several days so the building is kept at negative pressure (a sort of vacuum state) trapping the odor inside so not to offend the nearby community. The Biomass travels on a conveyor belt to the boiler building. It is combusted at >1500ºF which heats water in the boiler that produces steam to turn a turbine connected to a generator that produces the electricity. (See figure 3.0) (Discovery Channel videos, n.d.)
Figure 3.0 Boiler/Turbine Configurations

4.5.2 Risks and Challenges
The main current hurdle for biogas production is economic feasibility. The capital costs of large-scale anaerobic digester plants are very high and may range from a few hundred thousand to a few million dollars, depending on the size of the plant. Other key challenges are a lack of infrastructure and technological limitations related to efficient large-scale production and use of biogas. Developing a large centralized digester would also require major infrastructure and logistical frameworks to bring manure to one place, handle digestate and manage numerous other requirements. (Farming for Tomorrow, 2007)
4.5.3 Benefits
Environmental benefits of using anaerobic digestion to convert animal waste into energy:
• One billion tons of manure is produced in the U.S. annually. This amount of waste has the potential to generate 88 billion kwh of electricity, approximately 2.4% of the annual consumption in the U.S. and can eliminate 99 million metric tons of greenhouse gases.
• Waste heat from the digester engines saves fuel oil by heating the milking parlor and water for the farm. The water the runs through the pipes inside the digester maintain a temperature of 105º F.
• Wastewater goes to an auger style compressor that separates the liquids from the solids producing and “earthy” smelling soft bedding for the cows replacing the traditional green sawdust now in use. The new bedding contains less harmful bacteria.
• Microbes in the digester convert volatile fatty acids to odorless methane producing a liquid byproduct that is less potent to be used as fertilizer on the fields. Crops can take up the ammonia nitrogen quicker then the organic nitrogen in straight manure. (Bogo, 2009)
Environmental benefits of converting turkey waste into energy:
• Little to no pollution is generated by this process because of the advanced emission/pollution control equipment used at the power plant by Fibrominn. Only water vapor and minimal amounts of CO2 is emitted from the smoke stacks.
• This process does create large quantities of ash, but the ash is recoverable because it is rich in nutrients and can be used in fertilizers. (Discovery Channel videos, n.d.)
4.5.3 Future as Energy source
The U.S.-based Sierra Club is still very skeptical about the success of biomass as an energy source. It believes that anaeorbically digested manure has limited potential in the U.S., pointing out that even if all the 7,000 farms in the U.S. cited by the EPA as "good candidates" for anaerobic digestion technology was used, they could only produce 0.0002 percent of all energy consumed in the country today.
Proponents of biogas say that using waste products is far more preferable than biofuel since it steers clear of the "food crops v. fuel crops" dilemma. They also favor the fact that biogas negates the need for chemical fertilizers, since natural fertilizer is a by-product of the AD process, which means even more benefit in terms of greenhouse gas emissions. (Oliver, 2008)
5.0 Processes/Regulations/Technology
5.1 Regulation, Expenses, and Practicality
The availability of waste to energy facilities is steadily increasing. As of 2000, approximately 102 facilities implemented thermochemical, biochemical, or physiochemical processes to convert wastes to energy (Recovered Energy, Inc.). Currently, W2E plants process 14% of solid waste produced in the United States, over 30 million tons each year (Recovered Energy, Inc.). Facilities can reduce over 90% of the volume of waste while meeting regulatory standards in place by federal, state, and local governments. Although ash is still a byproduct from W2E processes, modern facilities and technology have determined alternative uses for ash.
Although calculation of the expenses of animal and agricultural waste to energy goes beyond the scope of this paper, the following tables present the potential for cost recovery when implementing waste to energy technologies. Carroll County, Maryland Estimates the following expenses and income:
Carroll County, Maryland: Expenses of Waste to Energy Table 1.0
Investment/Expenses/Income Est. 2012 Est. 2015
WTE Capital Cost 200 140 60
WTE Expenses 26.8 22.4 4.4
WTE Income 11.3 11.8 .5
(in millions)
Capital Cost: Investment in project
Expenses: Loan payment + Annual Operating Costs + Transportation Fees
Income: Electricity + Recovered Metals
(Carroll County Department of Public Works, 2008)

Table 2.0
- Electricity 9.5 10.0 .5
- Recovered Metals 1.8 1.8 0.0
Total Income 11.3 11.8 .5
(in millions)
(Carroll County Department of Public Works, 2008).
Table 1.0 represents the initial cost of the investment in the Waste to Energy facility, and the potential for income despite operating costs and transportation fees. Transportation fees are a potentially costly expense for Waste to Energy facilities, and consideration of this expense must be taken into account. The transportation of steam, fuels, and other recoverable materials to processing facilities must be considered in depth. Transferring these products over long distances and state lines determines costs and applicable permitting.
Table 2.0 identifies the potential for recoverable metals and electricity from waste to energy processing in Carroll County. Although this table may not represent applicable transportation and permitting fees, the potential for income recovery is great. This income can be used to fund projects for waste treatment facilities as well as technological advances in waste to energy facilities and continuing maintenance and meeting of regulatory requirements.
Regulation and Practicality
As seen in Table 1, implementing W2E strategies can be a great expenditure of funds up-front. However, over time, these funds are recoverable. Determining cost effective strategies and innovative strategies to meet regulatory standards can be a time consuming process. The following section outlines advantages and disadvantages of the implementation of a W2E facility:
• Cost of shipment of steam/fuel produced
• Permitting
• Costs of transportation of ash residue
• Emission of toxic gases and criteria air pollutants during combustion processes
• Potential of groundwater contamination due to ash production
• Waste to Energy facilities may reduce consciousness of source reduction and limits in production of waste. As technologies for waste management continue to evolve, waste producers may not recognize the potential impact of wastes on the environment and human health.
• Landfill volume is reduced
• Steam and fuel can be sold, increasing economic recovery as well as resource recovery at facilities
• W2E can be considered an environmentally responsible method of waste disposal (when in compliance with regulations.
• Clean, reliable, renewable energy sources with less environmental impact than other sources can be produced.
• Even ash residue can be reused as material for landfill construction, in asphalt mixtures and the production of cement blocks.
5.1 Regulations governing W2E
In implementing W2E facilities, it is important to consider all state, local, and federal regulatory requirements governing the production, transportation, and emissions produced by the facility. The use of advanced emissions control and monitoring technologies can ensure facilities meet federal state and local requirements in respect to the Clean Air Act. Careful consideration must also be used when determining methods for shipping and transporting fuels and other recoverable materials. Permitting may be necessary to move these items across state lines, or to other facilities. Maintaining proper management practices, and on going facility maintenance is necessary to stay up to date on regulatory guidelines while also maintaining an efficient process at the facility.

6.0 Recommendations 6.1 Policy recommendations/guidelines
The Federal government should:
• Provide long-term extension of tax incentives for renewable energy production and energy efficiency;
• Establish incentives for the construction and purchase of super fuel efficient
• autos such as plug-in electric hybrid vehicles;
• Set a national renewable electricity standard for utilities to produce a significant portion of their electricity from wind, solar, and geothermal energy. This should be at least 20% by 2020. It would reduce consumers' energy costs, energy price volatility and greenhouse gas emissions;
• Establish, enforce and update building code standards for energy efficiency in new and retrofitted buildings to save consumers money and reduce fossil fuel use;
• Provide incentives for efficiency related renovations Reduce building energy use by 50% by 2030;
• Put a price on carbon pollution, through a cap-and-trade program or other means;
• Modernize and expand the nation's electrical grid to make it smart and more secure, and capable of transferring or storing clean renewable energy in combination with electric vehicles, while providing greater access to such resources in an environmentally responsible way;
• Provide the technical and financial resources for a transition of states, like Nevada, and/or small countries around the world to be completely energy independent and carbon neutral to serve as an example of how these goals can be achieved;
• Act swiftly to increase the fuel efficiency of cars and trucks, and increase funding for private-public partnerships to build a transportation sector that uses far less or no oil;
• Buy, and give significant incentives to consumers and small businesses to buy, clean alternative fuel and plug-in hybrid vehicles. This should include natural gas heavy-duty fleet vehicles;
• Initiate electrification of our entire transportation sector so it uses only clean domestic energy soon;
• Fully fund and expand a green jobs/clean energy corps program to weatherize millions of homes, train workers for new energy technology application, build a smart grid, etc.;
• Provide incentives to states to decouple utility profits from electricity sales to encourage significant new investments in energy efficiency, and ensure net metering and “time of use” pricing/real time information is available;
• Create a Federal clean energy fund to invest in research, development and deployment of efficiency and renewable technologies;
• Encourage or direct utilities to organize the retrofitting of existing buildings to become significantly more energy efficient;
• Expedite identification and reservation of Federal public lands that have high potential for the environmentally responsible production of renewable electricity, and improving permitting processes for clean energy production on such lands;
• Vastly increase the budget for clean energy research, development and deployment, including greater emphasis on commercializing research funded by taxpayers;
• Greatly increase investments in public transit to make it more affordable and accessible;
• Fully fund and expand Low Income Home Energy Assistance Program (LIHEAP), low income weatherization and Energy & Environmental Block Grant programs;
• Reduce Federal government energy consumption by half within the next fifteen years;
• Fund research into carbon capture and storage technology that can dramatically reduce carbon dioxide emissions from coal fired power plants;
• Speed the transition from corn based ethanol to sustainable biofuels such as cellulosic ethanol made from wood chips, agriculture waste, and switch grass. This could include a joint US-Brazilian investment in sugar cane ethanol in the Caribbean, which would create jobs in this developing region;
• Convert solid waste landfills so that they produce waste heat, biofuels or fertilizer from methane emissions or organic materials; and
• Assist China and India and other developing nations with their adoption of clean energy technologies.
States Should Consider Policies to:
• Require all new state government buildings to be Leadership in Energy and Environmental Design (LEED) certified;
• Convert state vehicle fleets to clean alternative fuels;
• Create incentives for renewable energy by lowering property taxes for these facilities, and exempting them from sales tax; and
• Require that homeowner associations allow solar panels and other renewable technologies. 6.2 Future benefits
Digestion technology offers a lot of promise as way to power farms and small rural communities with a renewable and fossil-free energy, while also helping to manage the animal waste problems on farms. Farm runoff is an enormous environmental problem.
Anaerobic digestion protects surface streams from contamination because the process destroys some of harmful microorganisms that are carried in manure. In addition, digesters reduce the odor in manure, reduce the emission of greenhouses gases, and reduce dependence on fossil fuels. While the initial cost for a digester system is high, it does reduce fuel costs for a farm and even provides a small revenue source from selling electricity to the grid and selling the clean and digested manure.
Energy subsides are available as a form of tax credit for electricity generated form renewable sources including animal waste. To be eligible for the credit, the methane digester systems need to be capable of generating 150 kwh of electricity. (Clay, n.d.)

7.0 Conclusion
7.1 Summarize w2e: Movement of agricultural residue/animal waste from waste stream to energy, reduction of environmental/health risks. Future of w2e.

8.0 Works Cited

Animal feeding operations - nonpoint source pollution. (2009, February 5). Mid-Atlantic Water. Retrieved April 7, 2009, from Environmental Protection Agency Web site:

Aillery, M., Malcolm, S. (2009). Growing Crops for Biofuels Has Spillover Effects. Retrieved March 05, 2009 from United States Department of Agriculture Web site:

Alternative energy solutions, (2007). What is Biomass. Retrieved March 08, 2009 from Alternative energy solutions Web site:

Alvarez, T. (2008, July). Waste not, want not - who wants our waste? In Global alliance for incinerator alternatives. Retrieved April 10, 2009, from article.php?id=327

Biogas production opens new energy frontiers [Electronic version]. (2007, Fall). Farming for Tomorrow, 26-28. Retrieved April 10, 2009 from

Bogo, J. (2009, February). Cows to kilowatts. Popular Mechanics, 46-49.

California Biomass Energy Alliance, (). California’s Biomass Power Industry. Retrieved March 04, 2009 from California Biomass Energy Alliance Web site:

Carroll County Government – Department of Public Works. (2008). Status report on waste to energy presentation report. Retrieved March 30, 2009 from

Clay, M. (n.d.). Animal power: Turning animal waster into energy. In America's alternative energy sources. Retrieved March 17, 2009, from Susquehanna Valley Center for Public Policy Web site:

Department of Energy, (2006). Fact sheet: a scientific roadmap for making cellulosic ethanol a practical alternative to gasoline. Retrieved March 05, 2009 from Department of Energy Web site:

Erbach, D.C, Graham, R.L., Perlack, R.D., Stokes, B.J., Turhollow, A.F.,Wright, L.L. (2005). Biomass as feedstock for a bioenergy and Bioproducts industry. Retrieved March 08, 2009 from U.S Department of Agriculture Web site:

Gasification Technologies Council. (2008). What is gasification? Retrieved March 20, 2008 from

Graf, A., Koehler, T. (2000). Oregon Cellulose-Ethanol-Ethanol:An evaluation of the potential ethanol production in Oregon using cellulose-based feedstocks. Retrieved March 05, 2009 from Oregon Office of Energy Web site: http://www.ethanol-

Graham, R. L., Nelson, R., Sheehan J., Perlack, R. D., and. Wright, L. L. (2007). Current and potential U.S. corn stover supplies. Agronomy Journal, (99), 1-11. Retrieved March 12, 2009 from Web site:

Hammond, C. (1997, February 25). Animal waste and the environment. In University of Georgia
Engineering. Retrieved April 7, 2009, from publications/c827-cd.html Hill, A., Morris, M. (2006). Ethanol opportunities and questions. Retrieved March 11, 2009 from National Sustainable Agriculture Information Service Web site:

Keeney, D., Nanninga, C. (2008). Biofuel and Global Biodiversity. Retrieved March 11, 2009 from Institute for Agriculture and Trade Policy Web site:

National clean energy summit principles and policy recommendations. (n.d.). Nation Clean EnergySummit. Retrieved April 14, 2009, from

National Renewable Energy Laboratory. (2008). Learning About Renewable Energy and Energy Efficiency. Retrieved March 15, 2009 from the National Renewable Energy Laboratory Web site:

Oak Ridge National Laboratory, (2008). The Bioenergy cycle: a vision of the future. Retrieved March 04, 2009 from the Oak Ridge National Laboratory Web site: www://

Oak Ridge National Laboratory, (2008). Agricultural Residue-Harvesting. Retrieved March 04, 2009 from the Oak Ridge National Laboratory Web site:

Oregon State (2008). Biomass energy and the environment. Retrieved March 12, 2009 from the state of Oregon Web site:

Oregon State (2008). Digester Technology. Retrieved March 28, 2009 from the state of Oregon Web site: biogas.shtml#Digester_Technology

Oregon State (2008). Oregon’s biomass Energy Resources. Retrieved March 09, 2009 from the state of Oregon Web site:

Oregon State (2008). Biomass Energy. Retrieved March 09, 2009 from the state of Oregon Web Site:

Oliver, R. (2008, January 7). Animal waster: Future energy, or just hot air? In EcoSolutions.
Retrieved April 10, 2009, from CNN Web site:

Pollution indicator Animal Waste. (2005). Scorecard. Retrieved April 7, 2009, from

Recovered Energy, Inc. Discussion on traditional “waste to energy plants”. Retrieved March 30, 2009 from

Rinehart, L. (2006). Switchgrass as a Bioenergy Crop. Retrieved March 12, 2009 from National Sustainable Agriculture Information Service Web site: pub/PDF/switchgrass.pdf
State Energy Conservation Office (2008). Cellulosic Ethanol. Retrieved March 12, 2009 from State Energy Conversation Office Web site:

Soil Quality National Technology Development Team. (2006). Crop Residue Removal For Biomass Energy Production: Effects on Soils and Recommendations. Retrieved March 15, 2009 from the U.S Department of Agriculture Web site:

Stevens, C. (2007). DOE selects six cellulosic ethanol plants for up to $385 million in federal funding. Retrieved March 08, 2009 from the U.S Department of Energy Web site:

U.S Department of Energy. (2001). Biofuels and Agriculture: A factsheet for farmers. Retrieved March 12, 2009 from U.S Department of Energy Web site:

U.S Department of Energy. (2006). Energy Efficiency and Renewable Energy. Retrieved March 08, 2009 from the U.S Department of Energy Web site:

U.S Department of Energy. (2006). Fact Sheet: gas prices and oil comsumption would increase without biofuels. Retrieved March 04, 2009 from the Department of Energy Web site:

United States Environmental Protection Agency. (2008). Wastes – non-hazardous waste – municipal solid waste: combustion. Retrieved March 20, 2008 from

Williams, R.B., Jenkins, B.M., & Nguyen, D. (2003). Solid waste conversion: a review and database of current and emerging technologies (Interagency Agreement – IWM-C0172). Davis, CA: University of California Davis

Similar Documents

Free Essay

Emergingtechnology: Agricultural and Animal Waste to Energy

...EMERGING TECHNOLOGY: AGRICULTURAL AND ANIMAL WASTE TO ENERGY NEW TECHNOLOGIES IN ENVIRONMENTAL MANAGEMENT University of Maryland University College Spring 2009 Table of Contents 1.0 Introduction 1.1 Waste to energy definition/history/uses 1.2 Agricultural / Animal waste production 1.3 Graph, chart, quantities produced in United States, etc.. 2.0 Conversion of w2e 2.1 Conversion Pathways 2.1.1 Thermochemical 2.1.2 Biochemical 2.1.3 Physico-chemical 2.2 Factors affecting energy recovery 3.0 Agricultural Residue 3.1 Introduction to residue 3.2 What is it 3.3 Where is it produced 3.4 What is role in environment 3.4.1 Environmental risks 3.4.2 Health risks 3.5 Conversion of agricultural residue to energy 3.5.1 Process 3.5.2 Risks 3.5.3 Benefits 3.5.4 Future as energy source 4.0 Animal Wastes 4.1 Introduction to animal waste 4.2 What is animal waste comprised of 4.3 Where is it produced 4.4 What is its role in environment 4.4.1 Environmental risks 4.4.2 Health risks Table of Contents (Cont’d) 4.5 Conversion of animal waste to energy 4.5.1 Process 4.5.2 Risks 4.5.3 Benefits 4.5.4 Future as Energy source 5.0 Processes/Regulations/Technology 5.1 Availability of w2e facilities, costs 5.2 Technological benefits/risks 5.2.1 Other information on technology of w2e, production, transportation, environmental implications 5.3 Regulation governing w2e 6.0 Recommendations 6.1 Policy......

Words: 8657 - Pages: 35

Free Essay

Environmental Challenges in Northern Nigeria: the Way Forward

...ENVIRONMENTAL CHALLENGES IN NORTHERN NIGERIA: THE WAY FORWARD A position paper submitted to Northern Delegates at the National Conference Abuja By Yusuf Abdullahi Rigasa (PhD) An Associate Chief Lecturer at the Department of Environmental Science Kaduna Polytechnic, currently on secondment to National Oil Spill Detection and Response Agency, NOSDRA, Federal Ministry of Environment Abuja. 2014 Introduction Northern Nigeria was a British protectorate which lasted from 1900 until 1914 and covered the northern part of what is now Nigeria. The protectorate spanned 255,000 miles (410,000 km) and included the states of the Sokoto Caliphate and the Kano emirate and parts of the former Bornu Empire, conquered in 1902. The protectorate was ended in 1914, when it was unified with Southern Nigerian Protectorate and Lagos Colony, to become Northern Province of the colony and protectorate of Nigeria or the Northern region. The Northern Region was one of Nigeria's federating units. It was created before independence in 1960, with its capital at Kaduna. In 1962, it acquired the territory of the British Northern Cameroons, who voted to become part of Nigeria. In 1967 the region was split into states - Benue-Plateau State, Kano State, Kwara State, North-Central State, North-Eastern State and North-Western State. Currently, the region comprises of 19 states and Federal Capital Territory Abuja. The climatic conditions in the northern part of Nigeria......

Words: 4420 - Pages: 18

Premium Essay

Information Revolution

...Effects of Information Revolution on the Environment Student Name: LAM Yan Tung (Tim) Student ID: 43369065 Class: Practical 10 Tutor: Shadi Class date: Tuesday 4pm Introduction The world has become a global village over the past one decade. This is attributed to the rapid development and expansion of technology, especially that which has to do with information. This rapid growth is no less than a revolution. Information revolution owes its existence and growth to the development of technology, which began with the invention of the computer and has seen the invention of communicative devices such as advanced computers, cellular phones, smart televisions, satellite dishes, radios, digital communications, microchips, tablets, I pads, just to mention but a few. These devises are vital in the creation of information as well as its transmission to millions of audiences all over the world. A single event such as a football match is transmitted to millions of fans in all the continents in real time, also giving fans a chance to interact and analyze the event, thanks to social media. Storage of information has become easy with this revolution, because these devices are equipped with a memory hence a user has the option of retrieving it whenever need arises. Management of information is also facilitated because these devices have the capability of sorting, tabulating and presenting information in a more simplified manner. Therefore, this revolution has the ability to shape......

Words: 2238 - Pages: 9

Premium Essay

Ingridenents of the Food System

...tied.7 Food may provide temporary relief from anxiety, depression, loneliness and boredom.7 Feelings of joy and other positive emotions may inspire healthier, more pleasurable eating experiences.7 These examples illustrate just a few of the ways that food is an integral part of human lives. We all experience food, if for no other reason than because we all consume it. Our relationship with food, however, extends far beyond the act of eating. Food takes a complex journey from its origins on farm fields, ranches, rivers, oceans and other sources to consumers’ plates. Along the way, it passes through the hands of producers (including farmers, ranchers and fishermen), processors, transporters, warehouse operators, retailers, consumers and waste handlers. The term food system or supply chain describes this series of interdependent links, including the people and resources involved at each stage. In this curriculum, we frequently refer to five major stages along the supply...

Words: 4438 - Pages: 18

Free Essay

Systems Thinking and Sustainable Development solve complex issues impeding sustainability challenges and develop quality solutions. Since its conception in 1920 by Jan Smuts Holism, it has developed and solved many issues (Gharajedaghi p.2013 558). Pollution is a complex issue which is intertwined in different processes and impacts in diverse ways. Thus, the topic is significance in pursuing ways to help solve the pollution. Ocean pollution also referred to as marine pollution is a wicked problem which has been increasing in complexity day in day out. This is because of the increasing population growth which stands at 7.2 billion worldwide (Noga & Wolbring 2013 p.3615). The increased industry establishment is directly proportional to chemical waste which settle in the oceans. It causes death of marine animals and plants hence poor marine ecology. The aim of this essay is to use the knowledge and skills acquired in role of systems thinking to address Ocean pollution as a sustainability challenge. It will explore various sources of ocean pollution, types and elucidate possible strategies which could be adopted as mitigation...

Words: 2407 - Pages: 10

Premium Essay


...nearly one billion people still suffer from hunger and malnourishment, in spite of the fact that food production has been steadily increasing on a per capita basis for decades. Producing food to feed everyone well, including the 2 billion additional people expected to populate the planet by mid-century, will place greater pressure on available water and land resources. This report provides input into the discussions at the 2012 World Water Week in Stockholm, which is held under the theme of Water and Food Security, and was edited by Anders Jägerskog, Director, Knowledge Services at SIWI, and Torkil Jønch-Clausen, Chair of the World Water Week Scientific Programming Committee. It features brief overviews of new knowledge and approaches on emerging and persistent challenges to achieve water and food security in the 21st century. Each chapter focuses on critical issues that have received less attention in the literature to date, such...

Words: 19153 - Pages: 77

Free Essay

Social Issues

...describes the rationale for and preparatory process of the DEAP. The chapter introduces the district’s main profile covering the physical features, demographic, agroecological zones, and main environmental issues. Chapter two describes the District’s Environment and Natural resources of Land, Water, Biodiversity (forest, wildlife, and Dry lands biodiversity), wetlands and agriculture, livestock and fisheries. For each resource, major environmental issues, challenges and proposed interventions are identified. Chapter three discusses the Human settlements and infrastructure in Meru North District covering situation analysis, challenges and proposed interventions. Environmental challenges addressed include; waste management, sanitation, pollution, diseases, land use, demand for water, energy, materials for construction, land and wetlands degradation, policy and legislation, biodiversity loss and land tenure. Chapter four addresses...

Words: 21147 - Pages: 85

Free Essay

Policy Options for Planning Agricultural Education in India

...indirectly with this sector. This sector has a strong mutually beneficial interface with the industry sector. Notwithstanding its declining share in country’s GDP, agriculture continues, and will continue to be the key to nation’s growth and development. Over the years Indian agriculture had made tremendous progress which, in a large measure, is directly or indirectly, due to the contributions of agricultural science and technology, and development of human skills to take advantage of the technology, be it through development of improved seed and planting material, plant protection, irrigation and soil conservation measures, mechanization and other productive agricultural practices as well as in putting on ground a massive infrastructure for extension work and transfer of technology to the farmers. In recent times, however, the pattern of agricultural growth has become somewhat erratic. The challenges that Indian agriculture faces today because of factors like shrinkage of available land, decline in soil quality and response to inputs, inadequate and uneven penetration of technology and skills, and above all factors induced by the inexorable forces of international competition and climate change are indeed huge both dimensionally as well as in complexity. The obstacles posed by these factors to accelerated development of agriculture that is required to meet the Plan targets and to ensure nation’s food security can only be overcome with increased inputs of problem-oriented......

Words: 5228 - Pages: 21

Free Essay

Agriculture Trend in Bangladesh

...Agricultural Research Priority : Vision- 2030 and beyond Sub-sector: Livestock Professor Dr. A.M.M. Tareque And Dr. Shah Md. Ziqrul Haq Chowdhury Bangladesh Agricultural Research Council Farmgate, Dhaka April 2010 Research Priority in Agriculture and Vision Document-2030 and beyond Table of Contents Sl. No. 1 2 3 4 Subject Methodology/Work plan Terms of Reference (TOR) of the Group Leader Executive Summary Vision Document 2030 and beyond: Livestock Research in Bangladesh Background Review of the past Plans Targets: Achievable goals of livestock sub-sector under Vision 2021; Bangladesh for Resolution of Crisis and a Prosperous Future” Problems/Constraints Research Areas Commodity wise Research Priority Large Ruminants (Cattle and Buffalo) Small Ruminants (Goat and Sheep) Poultry Common to livestock health and production Hill Research Conclusion References Page No. 2 2 3 5 5 6 7 5 11 13 8 9 10 11 12 13 14 15 16 17 13 15 18 19 24 27 30 31 33 33 1 Research Priority in Agriculture and Vision Document-2030 and beyond Methodology/Work plan Twelve Experts Team have been formed in BARC in connection with the preparation of Vision Document–2030 and beyond vide letter No.ARC/P&E/103/2008/1540, dt. 29-10-09. Livestock Sub-sector group composed of Professor Dr. A.M.M. Tareque, as Group Leader and Dr. Shah Md. Ziqrul Haq Chowdhury, CSO (Livestock), BARC, as Member-Secretary. The work started with the convening of a day long workshop on SPGR priority......

Words: 11793 - Pages: 48

Free Essay


...The Impact of Science and Technology on the Agricultural Era From about 10,000 years ago, groups of people in several areas around the world began to abandon the foraging lifestyle that had been successful, universal and largely unchanged for millennia (Lee & DeVore 1968). They began to gather, then cultivate and settle around, patches of cereal grasses and to domesticate animals for meat, labor, skins and other materials, and milk. The earliest civilizations all relied primarily on cereal agriculture. Cultivation of fruit trees began three thousand years later, again in the Middle East, and vegetables and other crops followed (Zohari 1986). Cultivation of rice began in Asia about 7000 years ago (Stark 1986). HISTORICAL BACKGROUND In 1884 Arnold Toynbee coined the phrase ‘the Industrial Revolution’ to describe the great changes in the organization, methods and productivity which took place in late eighteenth-century England. Not surprisingly historians soon dubbed the parallel changes in agriculture ‘the Agricultural Revolution’ … approximately 1760 and 1820 the farming of this country underwent and equally abrupt and radical change (Grigg, 1967). As humans began to form permanent settlements and gave up traveling in search of food, agriculture was born. The foods we eat, the clothing we wear, the materials we use in our everyday lives is agriculture. The term agriculture refers to a wide variety of things, it is the science, art and occupation of cultivating the soil...

Words: 4218 - Pages: 17

Free Essay


...National Agricultural Scenario | | India’s economic security continues to be predicated upon the agriculture sector, and the situation is not likely to change in the foreseeable future. Even now, agriculture supports 58% of the population, as against about 75% at the time of independence. In the same period, the contribution of agriculture and allied sector to the Gross Domestic Product (GDP) has fallen from 61 to 19%. As of today, India supports 16.8% of world’s population on 4.2% of world�s water resources and 2.3% of global land. And per caput availability of resources is about 4 to 6 times less as compared to world average. This will decrease further due to increasing demographic pressure and consequent diversion of the land for non-agricultural uses. Around 51% of India’s geographical area is already under cultivation as compared to 11% of the world average. The present cropping intensity of 136% has registered an increase of only 25% since independence. Further, rain fed dry lands constitute 65% of the total net sown area. There is also an unprecedented degradation of land (107 million ha) and groundwater resource, and also fall in the rate of growth of total factor productivity. This deceleration needs to be arrested and agricultural productivity has to be doubled to meet growing demands of the population by 2050. Efficiency-mediated improvement in productivity is the most viable option to raise production. The country recorded impressive achievements in......

Words: 7588 - Pages: 31

Premium Essay

Energu Resources

...Energy Resources and its Management First Mr. Ankit Kumar Sharma, Second Mr. Arpit Kapoor, and Third Mr. Anil Kumar Yadav,, Assistant Professor, Deptt. Of Electrical Engg., JNU, Jaipur; Final Year, Electrical Engineering, JNU Jaipur; Final Year, Electrical Engineering, JNU, Jaipur ABSTRACT The present energy needs of the world are supplied by the drastic use of non-renewable sources of energy, which are mainly the fossil fuels or the nuclear fuels, which are no doubt very good, but will not last for ever, they will end very soon. By fossil fuels I am throwing light on coal, petroleum, natural gas, etc. which on combustion emits harmful gases such as carbon di oxide, carbon mono oxide which are harmful to the environment. Though the Renewable resources of energy which are the Solar Energy i.e. the energy from sun, Wind Energy, as the name suggests the energy from wind or the fast moving air, the Geothermal Energy i.e. the energy from the earth, energy generated from water known as hydro energy, biogas and many more. Which are no doubt very good energy sources and the qualities like everlasting and clean that is negligible pollution makes them the best in the lot. The present generation of energy is more from the non renewable resources which is bad for the nature and for the future also, thus we need to manage the use and organize the usage of both the resources so that they can be saved for......

Words: 2538 - Pages: 11

Premium Essay

Climate Change Report

...International Journal of Renewable Energy and Environmental Engineering ISSN 2348-0157, Vol. 02, No. 01, January 2014 The dynamics of social and ecosystem for the sustainable development of mankind: a system dynamics perspective B. GIRIDHAR KAMATH, VASANTH VASUDEVA PANDUBETTU KAMATH, LEWLYN L.R RODRIGUES Department of Humanities and Management, Manipal University, Manipal, Karnataka, India Email:,, Abstract: Human beings depend on the ecosystems for material and energy sources. Human-ecosystem interaction is closely related with the growing demands placed by people on ecosystems. Human activities have always had an impact on the ecosystem as a whole and over a period of time, this has had an irreversible impact on the ecosystem and the imbalance caused in the ecosystem have started to take its toll on the flora and fauna. The challenge now ahead of mankind is to focus on sustainable development and fight against issues like global warming and delayed rainfalls. Both the renewable and nonrenewable resources are under the threat of depletion. Issues like growing human population, deforestation, acute fuel shortage, and food production crisis drives our attention to sustainable development. The concept of sustainable development is making rounds ever since its inception in 1987. This paper proposes to build a conceptual model that relates social system and ecosystem with social, economic and environmental......

Words: 3200 - Pages: 13

Premium Essay

Pestle Analysis

...AHDB PESTLE Analysis and Outcomes 2013/14 Background AHDB Objectives are: i. ii. Deliver value for money for Levy Payers in everything we do. Improve efficiency and productivity in the industry to help levy payers have thriving businesses. Improve marketing in the industry to help profitability and customer awareness. Improve services that the industry provides to the community. Improve ways in which the industry contributes to sustainable development. iii. iv. v. PESTLE In our 2012 planning process (for 2013/14), we have considered the key challenges and opportunities facing the UK agriculture and horticulture industry through a PESTLE analysis. (Political, Economic, Sociological, Technological, Legislative and Environmental). Given that the six commodity sectors we work with are affected by the factors listed below to varying extents, we provide a brief description of the impact in the short-term and long-term. This PESTLE analysis is a planning tool (at a single point in time) and occasionally significant changes can occur quickly which will result in changes to the activities of AHDB, even though the PESTLE has not been formally reviewed. 1 Impact Short-Term within 3 years Impact Long-Term 3-20 years Implication for meeting the objectives of AHDB Political “GREEN GOVERNMENT” Green Government/Climate Change Mitigation will seek reduction in GHG emissions The Coalition Government has stated it wishes to be the greenest Government ever.......

Words: 9271 - Pages: 38

Free Essay

Company Analysis

...Agricultural Development Corporation Category Activity Description Agro-Industry/Agriculture Performance Testing- Performance Testing is the principal method used to Beef cattle identify high ranking individuals within a breed through the identification of such individuals within a herd. This systematic method will enable an increase in the rate of genetic improvement in the traits being measured. Newly weaned (average 8-10 months) bull calves are placed in a 140-day trial and given equal opportunity to perform through a uniform feeding and management regime. Record of economically important traits, adjusted 210 day weight, average daily gain adjusted 400 day weight and weight per day of age on all animals are systematically maintained. These records when statistically analyzed are used as the objective measures (indices) in selecting replacements and eliminating poor producers. 48 Caribbean Agricultural Research and Development Institute Category Activity Description Agro-Industry/Agriculture Animal Production and Sam Motta's Goats and Sheep Demonstration and Marketing Systems Training Centre Animal Production and Hounslow Goats and Sheep Demonstration and Training Marketing Systems Centre Animal Production and Small Ruminant Production and Marketing Systems Marketing Systems Development Crop Production and Marketing Systems Livestock Feeds and Feeding systems Enhanced Hot Pepper Production Feeding Systems development for......

Words: 16917 - Pages: 68