Comparison between controlled landfill reactor and conditioned landfill bioreactor.
Bioreactor landfills allow a more active landfill management that recognizes the biological, chemical and physical processes involved in a landfill environment. The laboratory-scale simulators of landfill reactors treating municipal solid wastes were studied, the effect of solid waste size, leachate recirculation, nutrient balance, pH value, moisture content and temperature on the rate of municipal solid waste (MSW) biodegradation were determined, and it indicated the optimum pH value, moisture content and temperature decomposing MSW. The results of waste biodegradation were compared with that of the leachate-recirculated landfill simulator and conservative sanitary landfill simulator. In the control experiment the antitheses of a decreasing trend of the organic load, measured as biological oxygen demand and chemical oxygen demand, was shown. An obvious enhancement of effective disposal from conservative sanitary landfill (CSL) simulator, to the leachate-recirculated landfill (LRL) simulator and to the conditioned bioreactor landfill (CBL) simulator would be noted, through displaying the compared results of solid waste settlement, heavy metal concentration in leachate, methane production rate, biogas composition, BOD and COD as well as their ratio.
Luo
Feng
F
College of Resource and Environmental Science, Chongqing University, Chongqing 400044, China. luofeng77@sina.com
Chen
Wan-Zhi
WZ
Song
Fu-Zhong
FZ
Li
Xiao-Peng
XP
Zhang
Guo-Qing
GQ
D001673:Biodegradation, Environmental; D019149:Bioreactors; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000032:analysis; D008697:Methane / Q000032:analysis; D010100:Oxygen / Q000032:analysis; D012037:Refuse Disposal / Q000295:instrumentation / Q000379:methods*; D012988:Soil Microbiology; D013696:Temperature; D014867:Water / Q000032:analysis; D014872:Water Movements
D019216:Metals, Heavy; D014867:Water; D008697:Methane; D010100:Oxygen