The efficacy of pandan leaf extract (PLE)

In this research, sago mill effluent was treated using anaerobic sequencing batch reactor (ASBR). Seven HRT from 10 to 1.5 days were tested to evaluate the methane production from sago mill effluent. The findings revealed the highest methane production rate was found at 1.288 L CH4/L reactor. d under HRT of 2 days The results showed that COD removals decreased from 70% to 47% as HRT was reduced from 10 to 2 days. The HRT 1.5 days was found critical for the studied system, which leads to decreased in methane production, yield and COD removal. Overall, ASBR was capable to treat sago mill effluent in producing methane by means of anaerobic digestion.

In this research, a study of anaerobic digestion to generate methane in anaerobic sequencing batch reactor (ASBR) were conducted in a single stage system (using raw sago mill effluent (SME) as substrate) and two stage system (using acidogenic effluents from hydrogenic reactor treating sago mill effluent) operated under mesophilic condition. The experiment was carried out over a range of hydraulic retention times (HRT) of 12 to 1.5 days in both single and two stage system, respectively. The corresponding organic loading rate (OLR) was 1.21 to 9.90 kg COD/m³.d and 1.41 to 11.17 kg COD/m³.d, respectively. The performance of methane generation and organic matter degradation of these two systems were evaluated and compared. The highest methane production rate (MPR) and methane yield (MY) were obtained from the two-stage system under HRT 2 days at 1.7111 L CH₄/L_reactor.d and 0.2257 L CH₄/g COD_removed respectively with a maximum percentage of COD reduction of 82%. Meanwhile, single stage system operated under the same HRT obtained lower methane production rate at 1.254 L CH₄/L_reactor.d and methane yield of 0.2217 L CH₄/g COD_removed. Overall, this study demonstrated a two-stage system is able to provide higher methane productivity as compared to a single stage system.