An Experimental Study On Bioreactor Landfill Disposal Of Municipal Solid Waste

Bioreactor landfill (BL) is one of new technologies developed from conventional sanitary landfill, which could be regarded as "Modified" sanitary landfill technology. The definition, characteristics, and developing history of the BL technology were summarized first in this paper. This part mainly includes the description of control approaches and the effects on the biological functions of BL, such as moisture content adjustment, pH value adjustment, addition of nutrients, temperature control, and pretreatment, etc. Then a few typical examples of engineering applications abroad were investigated. In addition, economical analyses on BL and SL were made. The results showed that BL technology has both functional and economical advantages over SL, and has great potential of being applied in China in the future for municipal solid waste treatment and disposal.This study investigated the practical performance of SL and BL for disposal municipal solid waste. The co-disposal of municipal solid waste with coal fly ash, and coal slag were also compared in this paper. Four experimental devices were set-up to simulate SL and BL. SL was used to landfill refuse only without any control, BLl, BL2 and BL3 were used as landfill bioreactors with leachate recirculation and pH adjustment. SL and BLl were full of refuse only, moreover BL2 and BL3 were full of refuse and coal fly ash, and coal slag, respectively. The daily and cumulative productions of landfill gas (LFG) of the four simulated devices were recorded, and methane content of LFG, chemical oxygen demand (COD) in leachate, and the initial and final volume and weight of filled wastes were analyzed. The results show that the production of LFG in BL is higher than that with SL, especially BL2 and BL3, reaches the 10-20 times higher than SL. COD in the leachate of BL is also reduced...