Inderscience Publishers

Effect of the solid content on biogas production from Jatropha curcas seed cake

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Anaerobic conversion of Jatropha curcas seed cake was studied in a five–litre working volume batch reactor at 30°C. Over a 60–day operating period, a slurry of seed cake in water at a 1 : 20 seed cake–to–water ratio showed the highest methane yield of 296 litre methane/kg Chemical Oxygen Demand (COD) degraded (or 156 litre/kg of Jatropha curcas seed cake added) and achieved 52% COD removal. The results revealed that Jatropha curcas seed cake treated anaerobically can be a good source of methane, with optimal seed cake–to–water ratio in the range of 1 : 20 to 1 : 10.

Keywords: agricultural waste, biogas production, global warming, Jatropha curcas, methane yield, solid content, anaerobic conversion, chemical oxygen demand, COD removal

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