Abstract
Abstract The production of biogas and its composition from an anaerobic pond treating domestic wastewater have been studied in the Sudano-Sahelian climate of Burkina Faso. The biogas production was measured from March 2010 to March 2011 using a floating static chamber, and the composition was analysed using a micro-gas chromatograph. The composition of biogas produced was relatively constant with time. The major component of the biogas by volume was CH4 which accounted for an average of 80.5%, N2 for 11.8%, O2 for 5% and CO2 for 2.5%. The mean areal production rates of biogas and methane respectively were 121 and 97 L m−2 d−1. The mean methane production rates were 248 L kg−1 COD removed and 588 L kg−1 VSS removed. The average daily volume of biogas and its corresponding methane were 5.73 and 4.63 m3 d−1, respectively, equivalent to a ratio of 7.3 m3 CH4 per capita-year. The conversion of this methane production to electricity could reduce the CO2 equivalent greenhouse gas emission from petrol combustion....
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