Effect of Additives on Biological Treatment of Landfill Leachate

摘要

Aerobic batch bioreactors were used in this research to study the effects of dif ferent additives on the biological treatment of landfill leachate. Those additives were phosphoric acid, powdered activated carbon, polyethylenimine and BOD Balance~TM. Both synthetic and natural land fill leachates were investigated. The natural leachate was collected at a landfill site near London, Ontario. It was observed that the addition of phosphoric acid increased the COD utilisation rate as well as decreased the effluent COD. The other additives did not affect the effluent COD but were found to have a small influence on the COD utilization rates, especially PEI and BOD Balance. A maximum average COD utilization rate of 90 mg·L~(-1)?h~(-1) was obtained with the following combination of addi- tives: phosphoric acid and BOD Balance at 5 mg· L~(-1).