NADH 센서를 이용한 생물학적 동시 탈질·질산화공정에서 질소, 인제거 영향인자 및 거동 평가
Evaluation of Affecting Factors and Trace on N and P removal in Biological SND(Simultaneous Nitrification and Denitrification) Process with NADH Sensor
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
In this study, the factors affecting on biological N and P removal using SND (simultaneous nitrification and denitrification) process were investigated and evaluated to find the possibility for treating N and P through SND with NADH by surveying N and P trace in aeration tank. The results on surveying the variation of NH₄+-N+NO₃−-N concentration in order to estimate the degree of SND in each point (P2, P3, P4, P5) of aeration tank showed that denitrification efficiency in P2 (front zone), nitrification and denitrification efficiencies in P4 (middle zone) were 67%, 86% and 39%, respectively. When it analyzed PO₄-³-P concentration in each point of aeration tank, PO₄-³-P concentration into P2 was 1.25 mg/L, increased to 2.22 mg/L by P release in P2 zone, decreased to 0.74 mg/L by P uptake in P4. Consequently, we could estimate which high P removal efficiency observed in this study was caused by biological phosphorus removal. To find the operating factors affecting effluent T-N, we analyzed the correlation among FN/M ratio, C/N ratio, Temp. and SRT etc and then the results showed that the correlation among FN/M ratio, C/N ratio and Temp was no high. However, in the relationship of SRT and other parameters (effluent NH₄+-N and effluent BOD), the short SRT could be affected on effluent NH₄+-N and so effluent BOD could be increased. Thus, SRT operation should be controlled over 10 days. The results for analyzing the correlation between SRT and influent NO₃--N in order to investigate the operating factors affecting effluent T-P showed that T-P or PO₄-³-P was no high correlation with SRT, whereas PO₄-³-P concentration increased along with increasing NO₃--N concentration into P2. Based on these results, we could obtain the conclusion which effluent PO₄-³-P concentration depend on NO₃--N concentration into P2 using regression analysis (R²=0.97).
Abstract
In this study, the factors affecting on biological N and P removal using SND (simultaneous nitrification and denitrification) process were investigated and evaluated to find the possibility for treating N and P through SND with NADH by surveying N and P trace in aeration tank. The results on surveying the variation of NH₄+-N+NO₃−-N concentration in order to estimate the degree of SND in each point (P2, P3, P4, P5) of aeration tank showed that denitrification efficiency in P2 (front zone), nitrification and denitrification efficiencies in P4 (middle zone) were 67%, 86% and 39%, respectively. When it analyzed PO₄-³-P concentration in each point of aeration tank, PO₄-³-P concentration into P2 was 1.25 mg/L, increased to 2.22 mg/L by P release in P2 zone, decreased to 0.74 mg/L by P uptake in P4. Consequently, we could estimate which high P removal efficiency observed in this study was caused by biological phosphorus removal. To find the operating factors affecting effluent T-N, we analyzed the correlation among FN/M ratio, C/N ratio, Temp. and SRT etc and then the results showed that the correlation among FN/M ratio, C/N ratio and Temp was no high. However, in the relationship of SRT and other parameters (effluent NH₄+-N and effluent BOD), the short SRT could be affected on effluent NH₄+-N and so effluent BOD could be increased. Thus, SRT operation should be controlled over 10 days. The results for analyzing the correlation between SRT and influent NO₃--N in order to investigate the operating factors affecting effluent T-P showed that T-P or PO₄-³-P was no high correlation with SRT, whereas PO₄-³-P concentration increased along with increasing NO₃--N concentration into P2. Based on these results, we could obtain the conclusion which effluent PO₄-³-P concentration depend on NO₃--N concentration into P2 using regression analysis (R²=0.97).
참고문헌 (18)
- Barnard, J., "Biological nutrient removal without addition of chemicals", Water Research, 9, pp.485~490 (1975)
- Fush, G. W., "Microbiological basis of phosphate removal in the activated sludge process for the treatment of wastewater", Microb Ecol, 2, pp.119~138 (1975)
- Nicholls, H. A., "Bacteria stress: prerequisite for biological removal of phosphorus", J Water Pollut Control Fed, 51, pp.557~569 (1979)
- Comeau, Y., "Biochemical m odel f or e nh anced biological phosphorus removal", Water Resource, 20(12), pp.1511~1521 (1986)
- Wentzel, M. C., "Metabolic behaviour of Acinetobacter spp", in enhanced biological phosphorus removal a biochemical model Wat, 12, pp.209~224 (1986)
- Trivedi., "Sewage treatment process with phosphorus removal" (2002), US Patent 6712970
- 김영규, "미생물 코팅 담체를 이용한 하수의 질소？인 제거에 관한 연구", 한국환경보건학회지, 32(1), pp.27~35 (2006), 한국환경보건학회
- Barth, E. F., "Chemical- Biological Control of Nitrogen and Phosphorus in Waste Water Effluent", JWPCF, 40(12), pp.2040~ (1968)
- Grady, C. P. L., "Biological Wastewater Treatment" (1999), Marcel Dekker
- Jang, S. J., "Effect of NOD on BOD test for the effluents of biological treatment plant, Academic Conference, Korean Society on Water Quality", pp.1379~1388 (2006), Korean Society of Water and Wastewater
- Chuang, S. H., "Effects of SRT and do on nutrient removal in a combined as biofilm process", Science and Technology, 36, pp.19~27 (1997)
- Korean ministry of environment, "Analysis of operating state in municipal wastewater treatment plant", ~ (2006)
- Henze, M., "Wastewater Treatment. Biological and Chemical Process", Springer Verlag, 383 (1995)
- Zhao, H. W., "Factors affecting phosphorus removal in a two-stage intermittent aeration process treating domestic sewage", Water Science and Technology, 38(1), pp.115~122 (1998)
- Siebritz, P., "A parametric model for biological excess phosphorus removal", Water Science and Technology, 15(3-4), pp.127~152 (1983)
- Bundgaard, E., "Methods for improving biological phosphorus removal", pp.148~ (1993), Kriiger
- Giedre, V., "Investigation into biological nutrient removal from wastewater", Journal of Environmental Engineering and Landscape Management, 8(4), pp.177~181 (2005)