Abstract
Addition of landfill leachate to a domestic wastewater treatment system may have negative impacts since leachate is a highly concentrated wastewater both in terms of inorganic and organic pollutants. The aim of this study was to investigate the effluent quality in the cotreatment of sanitary landfill leachate and domestic wastewater and the improving effect of powdered activated carbon (PAC). The volumetric ratio of leachate was varied from 5 to 25% (v/v). Batch activated sludge (AS) reactors were fed with leachate and domestic wastewater. Parallel AS + PAC reactors also contained PAC, which was added at the dose of 100-3,500 mg L-1. The nonbiodegradable soluble COD (SCOD) in leachate was decreased to very low levels by this addition. Experiments were also conducted in Semi-Continuously Fed Batch (SCFB) and Continuous-Flow (CF) activated sludges with recycle. In both types of operations, effluent COD and ammonium nitrogen concentrations increased when the leachate input increased. In all cases, the positi...
Published Version
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