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pp.275-281
Anaerobically treated food wastewater still contains high concentration of organic carbon and nitrogen. Consequently,subsequent treatments are needed to meet the effluent criteria of wastewater. Injection of treated food wastewater into awaste landfill body could be one alternative for its subsequent treatment. In this study, preliminary experiments wereconducted to inject treated food wastewater into waste landfill body. Firstly, Biochemical Methane Potential (BMP) testwas conducted to evaluate the methane generation potential of the injected food wastewater. Secondly, anaerobicallytreated food wastewater showed clogging problem during the initial stage of laboratory scale lysimeter injectionexperiment. Accordingly, pretreatments were needed, and we experimented the change of viscosity of the wastewater afterchemical injection (1N acid or base solution) or aeration of wastewater. From the results, BMP for the treated foodwastewater showed 373.8mL CH4/g VS, which was 53% of untreated food wastewater’s. Practically feasible solution toreduce the viscosity of treated food wastewater was 1 day aeration before injection into the waste landfill body.
