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The increasing demand for energy has led to the utilization of fossil fuels more abundantly as a quick resort for generation of energy. The use of these sources of energy however as led to the generation of greenhouse gases which tend to cause climate change, thus affecting the ecosystem at large coupled with the continual depletion of these energy sources. Thus, the search for alternative sources of energy which are renewable and has less or no pollution. One of such alternative sources is industrial wastewater which have shown to have high concentration of nutrients in the form of organic contents which can be converted by microorganisms into energy, usually known as biogas, comprising majorly of CH4, CO2 and H2. Another important factor is that industrial wastewaters are a renewable energy source which are continuously generated due to increasing urbanization and population growth. In this study, the characteristics of three agro-industrial based wastewaters used shows their potential for application in anaerobic co-digestion technique. Biochemical methane potential (BMP) test of three industrial wastewater effluents: brewery, dairy and sugar wastewater (BW, DW and SW) respectively were investigated as co-substrates for sewage sludge (SS) for biogas production. Assays with inoculum –substrate ratio (ISR) of 1:1 at 35C and 2:1 at 25C for SW and DW respectively had the highest methane production within the first three (3) weeks. The kinetic models that best fit the anaerobic co-digestion with SW was the first order model.

Kinetics Analysis for Anaerobic Co-digestion of Sewage Sludge and Industrial Wastewater