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Essay on Sustainability

In: Other Topics

Submitted By Adebukola02
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Journal of Sustainable Development; Vol. 5, No. 7; 2012 ISSN 1913-9063 E-ISSN 1913-9071 Published by Canadian Center of Science and Education

Achieving Environmental Sustainability in Wastewater Treatment by Phytoremediation with Water Hyacinth (Eichhornia Crassipes)
Tolu Olufunmilayo Ajayi1 & Atoke Olaide Ogunbayo1
1

Department of Chemical Engineering, University of Lagos, Akoka, Yaba, Lagos State, Nigeria

Correspondence: Tolu Olufunmilayo Ajayi, Department of Chemical Engineering, University of Lagos, Akoka, Yaba, Lagos State, Nigeria. E-mail: tajayi@unilag.edu.ng Received: May 22, 2012 Accepted: June 16, 2012 Online Published: June 25, 2012 doi:10.5539/jsd.v5n7p80 Abstract Small and medium scale industries in Nigeria play a major role in polluting water bodies, and key among these pollutants are suspended solids, biological oxygen demand and heavy metals contamination. Conventional methods of treatment, such as chemical precipitation, do not provide sustainable solutions as the pollutants are merely transferred from the waste water to a sludge residue which is disposed of by land-filling. The pollutants eventually find their way to freshwater supplies thereby contaminating it. Water hyacinth is a noxious weed that has a rapid growth rate and easily congests the water ways in Lagos, a coastal city in Nigeria, thereby creating serious problems in navigation, and irrigation. This can be harvested, and in line with the golden rules of sustainable development, used for the sustainable treatment of some industrial wastewaters. This work investigates the effectiveness of water hyacinth in wastewater treatment. After a 5-week simple experiment, in which water hyacinths were planted in wastewater samples obtained from three different industries, the average removal of pollutants were found to be 53.03%, 64.41%, 65.4%, 47.22%, 94.67% and 30.30% for Total Suspended Solids...

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