환경위생공학 (Journal of environmental and Sanitary engineering)
- 제14권4호
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- Pages.110-116
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- 1999
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- 2005-5889(pISSN)
부착증식공정에서 내부 반송율 변화에 따른 생물학적 제거 특성
Biological Removal Characteristics by the Internal Recycle Rate in the Attached Growth Process
초록
This study was conducted to investigate the contaminants removal efficiency and the optimal operating parameters by the internal recycle rate (IRR) in the combining A2/O process with fixed film. The average removal efficiency of BOD and COD was 92.5%~94.6%, 73.9%~87.0% in RUN 1 and 91.9%~94.7%, 77.7%~89.0% in RUN 2, respectively. Organic removal efficiency, at two different hydraulic retention time of 10 and 14hr, was similar. At 50% of the internal recycle rate, organic removal efficiency was somewhat higher than the other. Total nitrogen (T-N) and total phosphorus (T-P) were removed, highly, at 50% of internal recycle rate. It could be suggested by this study that the optimum internal recycle rate is 50% and hydraulic retention time is 14hr.
키워드