Modeling biogas production from organic fraction of MSW co-digested with MSWI ashes in anaerobic bioreactors

Lo, H.M., Kurniawan, TA, Sillanpaa, M.E.T., Pai, T.Y., Chiang, C.F., Chao, K.P., Liu, M.H., Chuang, S.H., Banks, C.J., Wang, S.C., Lin, K.C., Lin, C.Y., Liu, W.F., Cheng, P.H., Chen, C.K., Chu, H.Y. and Wu, H.Y. (2010) Modeling biogas production from organic fraction of MSW co-digested with MSWI ashes in anaerobic bioreactors. Bioresource Technology, 101 (16), 6329-6335. (doi:10.1016/j.biortech.2010.03.048).

Abstract

This study aims at investigating the effects of MSW incinerator fly ash (FA) and bottom ash (BA) on the anaerobic co-digestion of OFMSW with FA or BA. It also simulates the biogas production from various dosed and control bioreactors. Results showed that suitable ashes addition (FA/MSW 10 and 20 g L?1 and BA/MSW 100 g L?1) could improve the MSW anaerobic digestion and enhance the biogas production rates. FA/MSW 20 g L?1 bioreactor had the higher biogas production and rate implying the potential option for MSW anaerobic co-digestion. Modeling studies showed that exponential plot simulated better for FA/MSW 10 g L?1 and control bioreactors while Gaussian plot was applicable for FA/MSW 20 g L?1 one. Linear and exponential plot of descending limb both simulated better for BA/MSW 100 g L?1 bioreactor. Modified Gompertz plot showed higher correlation of biogas accumulation than exponential rise to maximum plot for all bioreactors

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Contributors

Author: C.J. Banks

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