Determination of the Biogas Yielding Potentials of Cattle Dung and Cattle Egret Dropping

Abstract

Anaerobic fermentation of cattle dung and cattle egret droppings was carried out to determine their biogas yielding capacities. Two digesters labeled A and B were used. Digester A contained 50 g cattle dung and 500 ml of water and digester B contained 50 g cattle egret dropping and 500 ml of water (i.e. 0.1 gcm^-3 slurry concentration). The retention time was 10 weeks (70 days). The fermentation temperature varied from 27 to 33⁰C. The pH also varied from 6.8 to 8.2. The total biogas yield (TBY) over the 70 days was 6.779 liters for digester A and 4.494 liters for digester B. Analyses of physicochemical properties that had bearing on the digesters biogas production capacity was also carried out. The N., P and K analysis on the samples showed greater contents in undigested sample of A and contrarily, greater contents in digested sample of B.