고정화 질산균 , 탈질균을 이용한 합성폐수의 처리 특성 = Treatment Characteristics of Synthetic Wastewater using Immobilized Nitrobacteria , Denitrobacteria

다국어 초록 (Multilingual Abstract)

The objectives of this study were find out the optimum treatment conditions for removing nitrogen in a synthetic wastewater by using microorganisms immobilized with a PVA-Freezing Method. The samples used as influents to the laboratory scale treatment units were a synthetic wastewater. The experiments in this study were mainly directed to collect the data of nitrogen and organic matter removal efficiencies for the different hydraulic and internal recycle rates conditions, temperature and influent C/N ratios. The removal efficiencies of nitrogen and organic matters were investigated for the operating conditions of HRT 2~12hours,internal recycle rates 50~400%, temperatures 15~30℃ and C/N ratios 2.5~7.5. The adequate internal recycle rate for removing T-N and BOD_5 in the synthetic wastewater was found to be about 300% at the temperature of 30℃ when the ratio of carbon contents to the nitrogen (C/N) in the influent was around 5.5. Under these conditions, the final effluent concentrations of T-N and BOD_5 were 8.7 and 8.4 mg/l, respectively.