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TKN/COD비가 높은 소규모지역 오수의 생물학적 영양소 제거
이호식 忠州大學校 1999 한국교통대학교 논문집 Vol.34 No.2
Biological nutrient removal(BNR) system have known to be sensitive to the wastewater characteristics varied with sewer system used, types of detergent used, temperature and others. Generally, BNR system have applied to TKN/COD ratios of less than 0.13. However, most small community wastewaters represent the TKN/COD ratios of more than 0.20. This study was conducted to analyze basic performance characterisitics of BNR system for high ratios of TKN/COD wastewaters of small community. BNR system was applied to laboratory reactor with a templerature of 10 to 12℃. A total of 13.6L volume capacity including anaerobic(1.6L), anoxic(4L) and aerobic(8L) zeones. As that results of this study, organic material removal efficiency was more than 95%, nitrification and denitrification efficiency were 95%, 88%, respectively. But phosphours removal efficiency was low since nitrate(NO₃-N) concentration of return sludge was more than 8.0 mg/L.
이호식 충주대 산업과학기술연구소 1998 産業科學論文集 Vol.6 No.-
The returning ratio of water use is the ratio of water supply to wastewater flow. The data of returning ratio have been used its of the 1970∼80's until now. This study was conducted to analyze of water supply and wastewater flow the city of Chungju and Chechon. This survey was that divided into the returning ratio of water use for residential and industrial. Particularly, in considering of residential water using sectors were detached house, apartment house and the other communities, respectively. This study result of the water supply rate per capita per day were 200 lpcd(liter/cap./d) The returning ratio of water use the detached house, an apartment house and the other communities were 70%, 60∼80% and 70%, respectively. Approximately, the returning ratio of water use for industrial was around 100%.