2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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Clean Technology 2008

Wetland System: A Cheaper and Efficient Treatment Option for the Food Processing Waste in Africa

J. Akinkugbe Adelegan, O. Akinyele Agbede
Global Network for Environment and Economic Development Research, NG

Keywords:
wetland system, subsurface flow, wastewater treatment, effluent threshold, bioreactor

Abstract:
The study investigates an alternative wastewater treatment system for the food and beverage industry in Africa. A subsurface flow wetland system was designed and compared with a UASB bioreactor installed for a brewery in Nigeria. The cost of the installed 3000m3 bioreactor for the brewery industry is USD 5 million however the cost of the constructed subsurface flow wetland system with a capacity of 5,200m3 is USD 1.65 million. Hence, the cost of the designed wetland system is 33% of the cost of installed bioreactor. The cost of operation and maintenance of the designed wetland system is much lower than that of the installed bioreactor. The comparative treatment efficiency of the designed wetland system and the installed bioreactor shows that the waste characteristics for the designed subsurface flow constructed wetland after treatment falls within the USEPA threshold for food processing industry. However, for the installed UASB Bioreactor, most of the waste characteristics are above the stipulated threshold. In addition, the treatment efficiency of the designed subsurface flow constructed wetland for the controlling parameters; BOD, TSS and Faecal Coliform are 96.83%, 88.42% and 96.29% respectively. For the installed UASB reactor, the treatment efficiency for the same controlling parameters, BOD, TSS and Faecal Coliform are 62.94%, 15.36% and 63.81% respectively. Hence, the designed subsurface flow constructed wetland is more efficient in the removal of BOD, TSS and Faecal Coliform hence could be an excellent alternative for the food and beverage industry in Africa


Nanotech 2008 Conference Program Abstract