Effect Of Total Solids And Agitation Time On Biogas Yield, Using Rice Husk

The rice husk contains a high amount of organic matter, which is broken down by microbial activity using anaerobic digestion, yielding biogas. The various percentages of total solids (Ts) concentration of rice straw effect of agitation time, pH, temperature and effectiveness of microorganisms in the decomposition process were studied in order to determine the conditions for an optimum biogas yield. A floating dome anaerobic digester wasutilised, which contains different percentages of the Ts, and the biogas yield is monitored directly by a digital gas flow meter. It is observed that the amount of biogas yield generated for 10% Ts, 20% Ts and 30% Ts was 1.13, 1.25 and 1.03m(3), respectively. The result shows that 20% Ts concentration and 15min agitation time and pH of 7.2 had the maximum biogas yield.