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김수생,손희정,장성호,김철,박현건 동아대학교 환경문제연구소 1994 硏究報告 Vol.17 No.1
1. In biological treatment with AB-Process At A-step : as treatment condition operated HRT about 4hr and F/M ration below 5㎏BOD/㎏MLSS·d obtained removal efficiency of COD, BOD are respectively 30-40%, 15-25%. At B-step : as treatment condition operated HRT about 30hr and F/M ratio below 0.2㎏ BOD/㎏ MLSS·d obtained removal efficiency of COD. BOD are respectively 75-82%, above 91%. On the other hand, statistical overview of correlationship both unstable nondegradable pollutant removal efficiency in B-step and treatment of A-step, it found that excessive removal of BOD in-A-step bring about low loading in B-step caused a bad influence in stabilizing treatment. 2. The defect of AB-process are wanting actual domestic and difficult of A-step management but resistent in loading change, high loading and nonbiodegradable wastewater. And total capacity and electric cost could be reduced respectively about 50%, 40%, when these were campared wit conventional activated sludge system.