What is bio gas--Biogas typically refers to a mixture of gases produced by the breakdown of organic matter in the absence of oxygen. Biogas can be produced from regionally available raw materials such as recycled waste. It is a renewable energy source and in many cases exerts a very small carbon footprint.
Biogas is produced by anaerobic digestion with anaerobic bacteria or fermentation of biodegradable materials such as manure,sewage, municipal waste, green waste, plant material, and crops.[1] It is primarily methane (CH
4) and carbon dioxide (CO
2) and may have small amounts of hydrogen sulphide (H
2S), moisture and siloxanes.
The gases methane, hydrogen, and carbon monoxide (CO) can be combusted or oxidized with oxygen. This energy release allows biogas to be used as a fuel; it can be used for any heating purpose, such as cooking. It can also be used in a gas engine to convert the energy in the gas into electricity and heat.[2]
Biogas can be compressed, the same way natural gas is compressed to CNG, and used to power motor vehicles. In the UK, for example, biogas is estimated to have the potential to replace around 17% of vehicle fuel.[3] It qualifies for renewable energy subsidies in some parts of the world. Biogas can be cleaned and upgraded to natural gas standards when it becomes bio methane. Biogas is a biofuel and it generally refers to the gas produced from organic matter as it is broken down by biological means.
You can build a biogas plant for your home, community, at much larger commercial scales or a school project. Information, plans and designs are here for a range of applications. Biogas is often referred to as 'gobar gas' in India, a word derived from Hindi meaning cow dung.
Biogas can be produced by anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste and energy crops.
The biogas produced from a digester is comprised primarily of methane, carbon dioxide and other trace gases.

Bio gas used for--

When you build a biogas plant, methane, hydrogen, carbon monoxide and other trace gases are produced... but methane is the main combustible gas. Biogas is currently used as a low cost fuel in many countries for heating and cooking, and is also extracted from waste management facilities like sewage plants and landfill sites where it refined into biomethane and used to run engines to generate electricity.

Bio gas why beneficial--Biogas is classed as a renewable fuel, and generally qualifies for renewable energy certificates or subsidies in many parts of the world.

Method to manufacture bio gas—1. Another type of biogas is generated from wood-gas which is created by gasification of woody materials or other biomass. We have a whole site devoted to wood gasifiers with hundreds of files which are free to download just like this site. Information and documents show you how to build gasifier stoves, gasification plants for stationary engines, transport and much more

How does bio gas plant work-- 1 Organic input materials such as foodstuff remnants, fats or sludge can be fed into the biogas plant as substrate.
2 Renewable resources such as corn, beets or grass serve as feed both for animals such as cows and pigs as well as for the micro organisms in the biogas plant.
3 Manure and dung are also fed into the biogas plant.
4 In the fermenter, heated to approx. 38-40 °C, the substrate is decomposed by the micro organisms under exclusion of light and oxygen. The final product of this fermentation process is biogas with methane as the main ingredient. But aggressive hydrogen sulphide is also contained in the biogas. A fermenter made of stainless steel has the clear advantage that it withstands the attacks of the hydrogen sulphide and is usable for decades. Furthermore, a stainless steel fermenter provides the opportunity to operation the biogas plant also in the thermophile temperature range (up to 56 °C).
5 Once the substrate has been fermented, it is transported to the fermentation residues end storage tank and can be retrieved from there for further utilisation.
6 The residues can be utilised as high quality fertiliser. The advantage: Biogas manure has a lower viscosity and therefore penetrates into the ground more quickly. Furthermore, the fermentation residue quite often has a higher fertiliser value and is less intense to the olfactory senses.