Abstract: Abstract:Since intermediate cover is an important part of anaerobic bioreactor landfills, the permeability and chemical composition greatly affects the degradation of waste. In order to study the effects of intermediate covers on organics degradation in anaerobic bioreactor landfill, three sets of simulated anaerobic bioreactor landfills, R1, R2 and R3, were established. Intermediate covers of mineralized refuse with heavy calcium carbonate and mineralized refuse with natural zeolites were loaded into the R2 and R3, respectively. The results showed that VS, BDM and cellulose of waste in R1, R2 and R3 decreased by 69.81%, 75.06%, 73.86%, 66.87%, 82.86%, 75.38% and 67.96%, 75.41%, 72.90%, respectively. Compared to the maximum values, the concentration of COD_Cr and BOD₅ of leachate in R1, R2 and R3 were reduced by 25.45%, 29.72%, 23.01% and 39.28%, 45.66%, 46.74%, respectively. In conclusion, mineralized refuse with heavy calcium carbonate and mineralized refuse with natural zeolites could create optimal environments in reactors to promote the degradation of organics in waste and leachate. Mineralized refuse with heavy calcium carbonate, which could inoculate microorganisms and provide alkalinity for microbial growth, showed the most advantage to accelerate the degradation of organics in anaerobic bioreactor landfill.