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稻森悠平,小沼和博,水落元之,西村修 제주대학교 환경연구소 1996 환경연구논문집 : 제주대 Vol.4 No.-
Treatment of domestic and industrial wastewater and purification of polluted groundwater and lake water are very important for conservation of sound water environment. Biological treatment processes are widely used for wastewater treatment and natural water body purification, because most of the pollutants contained in wastewaters are degraded or assimilated by microorganisms. Nowadays, the technologies of mass cultivation of effective microorganisms and their introduction to waste water treatment system have been developed. The present report concerns the current situation and developing tendency of these biotechnologies. The importance of the application of effective microorganisms is also described.
생활 오수의 간헐포기 처리시설에 관한 저부하 운전에서 질소 제거특성
도森悠平,中島渟 慶星大學校 環境問題硏究所 1997 環境硏報 Vol.7 No.1
The water quality before and the secondary treatment in domestic wastewater treatment facilities in Chiba prefecture Japan were surveyed. T-N removal performance was high in the plants operated in intermittent aeration mode as compared with those operated in continuous aeration mode because of occurrence of biological denitrification in their process. The performance of T-N removal was low in the facilities of which influent BOD concentration was low even though it was operated in intermittent aeration mode. The decease of BOD was observed in equalization tanks in the facilities of resort condominiums of which influent BOD load was extremely low. The mean value of influent BOD/T-N ratio in such facilites was below 2. That caused lack of proton donor resulting in difficulty in progress of denirification while nitrification was advanced sufficiently. The relation between influent BOD/T-N ratio and T-N removal in surveyed 37 facilities suggested that the maximum T-N removal for a certain value of BOD/t-N ratio smaller than 4 decreased by the equation approximately: R =20x(BOD/T-N)+10, where R is the maximum T-N removal(%). This equation can be applied to estimate the amounts of proton donor to be added in facilities of which influent BOD/T-N ratio is low.