DOI QR코드

DOI QR Code

Evaluation of Affecting Factors on N and P removal in Biological SND (Simultaneous Nitrification and Denitrification) Process with NADH Sensor

NADH 센서를 이용한 생물학적 동시 탈질.질산화공정에서 질소, 인제거 영향인자 및 거동 평가

Kim, Han-Lae;Lee, Si-Jin
김한래;이시진

  • Published : 2008.10.31

Abstract

In this study, the factors affecting biological N and P removal using SND (simultaneous nitrification and denitrification) process were investigated and evaluated to examine the possibility of treating N and P through SND with NADH by surveying N and P traces in an aeration tank. Variations of $NH_4^+$-N+$NO_3^-$-N concentration were used to estimate the degree of SND in each point (P2, P3, P4, P5) of the aeration tank and these variations showed that denitrification efficiency in P2 (front zone), nitrification and denitrification efficiencies in P4 (middle zone) were 67%, 86% and 39%, respectively. When $PO_4^{-3}$-P concentration was analyzed in each point of the aeration tank, it was shown that $PO_4^{-3}$-P concentration coming into P2 was 1.25 mg/L, which increased to 2.22 mg/L by P release in P2 zone and then decreased to 0.74 mg/L by P uptake in P4. Consequently, we were able to estimate which high P removal efficiency observed in this study was caused by biological phosphorus removal. To determine the operating factors affecting effluent T-N, we analyzed the correlation among FN/M ratio, C/N ratio, Temp., SRT etc and these results showed that the correlation among FN/M ratio, C/N ratio and Temp was not high. However, the relationship of SRT and other parameters (effluent $NH_4^+$-N and effluent BOD) and the short SRT could have an affect on effluent $NH_4^+$-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 $NO_3^-$-N in order to investigate the operating factors affecting effluent T-P showed that T-P or $PO_4^{-3}$-P was not highly correlation with SRT, whereas $PO_4^{-3}$-P concentration increased along with increasing $NO_3^-$-N concentration into P2. Based on these results, we concluded, using regression analysis (R2=0.97), that effluent $PO_4^{-3}$-P concentration depends on $NO_3^-$-N concentration into P2.

Keywords

SND;NADH;N and P removal;simultaneous removal

References

  1. Nicholls, H. A. and Osborn, D. W. : Bacteria stress: prerequisite for biological removal of phosphorus, J Water Pollut Control Fed., 51, 557-569, 1979
  2. Kim, Y. G. and Cho, I. H. : A Study on the Removal of Nitrogen and Phosphorus of Municipal Wastewater with Biological Coated Media, Kor. J. Env. Hlth., 32(1), 27-35, 2006
  3. Jang, S. J., Lee, S. H., Park, H. S., Park, C. K. : Effect of NOD on BOD test for the effluents of biological treatment plant, Academic Conference, Korean Society on Water Quality. Korean Society of Water and Wastewater, 1379-1388, 2006
  4. Chuang, S. H., Ouyang, H. C. and You, S. J. : Effects of SRT and do on nutrient removal in a combined as biofilm process, Water Science and Technology, 36, 19-27, 1997
  5. Zhao, H. W., Mavinic, D. S., Oldham, W. K. and Koch F. A. : Factors affecting phosphorus removal in a two-stage intermittent aeration process treating domestic sewage, Water Science and Technology, 38(1), 115-122, 1998
  6. Giedre, V. and Algirdas, B. M. : Investigation into biological nutrient removal from wastewater, Journal of Environmental Engineering and Landscape Management, 8(4), 177-181, 2005
  7. Barnard, J. : Biological nutrient removal without addition of chemicals, Water Research, 9, 485-490, 1975 https://doi.org/10.1016/0043-1354(75)90072-X
  8. Bundgaard, E. and Petersen, G. : Methods for improving biological phosphorus removal, Kriiger, Copenhagen, Denmark, 148, 1993
  9. http://enviroquip.com
  10. Grady, C. P. L., Daigger, G. T. and Lim H. C. : "Biological Wastewater Treatment," 2nd ed., Marcel Dekker, New York, 1999
  11. Barth, E. F., Brenner, R. G. and Lewis, R. F. : Chemical- Biological Control of Nitrogen and Phosphorus in Waste Water Effluent, JWPCF, 40(12), 2040, 1968
  12. Siebritz, P., Ekama, G. A. and Marais, G. V. R. : A parametric model for biological excess phosphorus removal, Water Science and Technology, 15(3-4), 127-152, 1983
  13. Fush, G. W. and Chen, M. : Microbiological basis of phosphate removal in the activated sludge process for the treatment of wastewater, Microb Ecol., 2, 119-138, 1975 https://doi.org/10.1007/BF02010434
  14. Korean ministry of environment : Analysis of operating state in municipal wastewater treatment plant, 2006
  15. Comeau, Y., Hall, K. J., Hancock, R. E. W., and Oldham, W. K. : Biochemical model for enhanced biological phosphorus removal, Water Resource, 20(12), 1511-1521, 1986
  16. Henze, M., Harremoes, P., Jansen, J. C. and Arvin, C. E. : Wastewater Treatment. Biological and Chemical Process, Springer Verlag, 383, 1995
  17. Wentzel, M. C., Lotter, R. H., Loewenthal, R. E. and Marais, G. V. R. : Metabolic behaviour of Acinetobacter spp. in enhanced biological phosphorus removal a biochemical model, Wat. SA 12, 209-224, 1986
  18. Trivedi, Hiren, K. : Sewage treatment process with phosphorus removal, US Patent 6712970, 2002