Two-stage Anaerobic Process Treating Municipal Solid Waste (MSW) with Increasing Contents of Paper Waste (PW)

摘要

Food waste (FW) and paper waste (PW) are the two major components in the municipal solid waste (MSW). Anaerobic digestion is the promising method that can reduce the organic waste and produce the fuel gas of methane. In this study, the thermophilic-mesophilic (TM) two-stage anaerobic digestion process was operated in the long-run, to treat the artificial MSW that contained 0 %, 20 %, 40 %, 50 % and 60 % (TS) of PW and the rest of FW. As a result, the TM process was feasible to treat the MSW when PW contents were lower than 50%. The volatile solids (VS) destructions was 80.2 %, 80.5%, 79.9 % and 74.2 % when PW were 0 %, 20 %, 40 % and 50 %, respectively. Besides, their methane yields were 446, 365, 344, 333 L-CH_4/kg-VS, respectively. However, TM process was not able to directly treat the MSW that contained 60 % (TS) of PW because the performance showed a trend towards alkalinity deficiency for methanogenesis within half of the retention time of the process.