Enhanced Biogas Production from a Stimulated Landfill Bioreactor for the Co-disposal of Municipal Solid Waste and Coal Wastes

A laboratory experiment was carried out to determine the effect of landfill bioreactor with additives of fly ash and cinder, leachate recirculation, and pH adjustment on the disposal municipal solid waste. Four simulators were used with one sanitary landfill and three landfill bioreactors. The results showed that landfill bioreactors can significantly enhance the biodegradation and upgrade the biostablization, and the leachate recirculation and pH adjustment in the bioreactor had a positive effect on municipal solid waste degradation. The landfill bioreactors could increase 11.7% landfill space and reduce the concentration of chemical oxygen demand concentration in leachate by over 60% than a sanitary landfill.