Abstract
Methane gas (CH4) production from the anaerobic methanogenesis degradation of palm oil wastewater was carried out in laboratory continuous stirrer suspended closed anaerobic reactor (SCAR) at mesophilic temperature of 35°C. The reactor was operated at different feed flow-rates of 375mL, 450mL, 560mL, 750mL and 1125mL of palm oil wastewater per day which correspond to hydraulic retention time (HRT) of 12, 10, 8, 6 and 4 days. The anaerobic degradation variables such as pH, effluent concentration of chemical oxygen demand (COD), COD removal efficiency, biogas production rate and composition were investigated. The result showed that the SCAR methanogenesis anaerobic degradation can achieve COD reduction of 66.09%, methane composition of 48.05% and attain of 532.06mL CH4/day of methane production rate at HRT of 12 days.
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