Browse > Article

Comparison of Phosphorus and Nitrogen Removal Characteristics between A2/O and Modified Phostrip Processes  

Kim, Kwang-Soo (Construction Environment Research Dept., Korea Institute of Construction Technology)
Kim, I-Tai (Construction Environment Research Dept., Korea Institute of Construction Technology)
Publication Information
Journal of Korean Society on Water Environment / v.21, no.6, 2005 , pp. 664-668 More about this Journal
Abstract
An experimental study for the comparison of nitrogen and phosphorus removal efficiencies between $A^2/O$ and modified Phostrip (M-Phostrip process) were carried out with bench-scale reactors. In case of nitrogen removal efficiencies both of processes showed similar ones when influent organic loadings were high. However, M-phostrip process was more effective than $A^2/O$ at low organic loadings. This is why M-phostrip process consumes the whole mass of influent organics as a carbon sources for denitrification in anoxic reactor but the anoxic reactor of $A^2/O$ process utilizes the residual carbon followed by consumming a part of influent carbon for phosphorus release in anaerobic reactor. $A^2/O$ process required the influent COD/T-P and COD/TKN ratios were more than 56 and 10, respectively, to take place the phosphorus release in anaerobic process and phosphorus uptake in oxic process. However, the luxury uptake of phosphorus in M-phostrip process was not affected by influent COD/T-P and COD/TKN ratios and the adverse effect of nitrate in return sludge introduced to the p-stripper from the 2nd clarifier was not significant due to the configurational advantage of the p-stripper.
Keywords
Influent COD/T-P and COD/TKN ratios; $A^2$/O and M-phostrip; P-stripper;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Kuba, T., Vanloosdrecht, M. C. M., and Heijnen, J. J., Occurence of DenitritYing Phosphorus Removing Bacteria in Modified UCT-Type Wastewater Treatment Plants, Wat. Res., 31(4), pp. 777-786 (1997)   DOI   ScienceOn
2 Marais, G. v. R., Loewenthal, R. E., and Siebritz, I. P., Observations Supporting Phosphate Removal by Biological Excess Uptake-A Review, Wat. Sci. Tech., 15, pp. 15-41 (1983)
3 Siebritz, I. P., Ekama, G. A., and Marais, G. V. R., Parametric Model for Biological Excess Phosphorus Removal, presented at the I.W.P.R. Post Conference Seminar on Phosphate Removal, Pretoria (1982)
4 Kim, K. S., Joe, K. M., and Choi, H. C., Pilot Study on Nitrogen and Phosphorus Removal by a Modified Phostrip Process, Water Sci. and Tech., 42(3-4), pp. 199-206 (2000)
5 Ostgaard, K., Chrisrensson, M., Jonsson, K., and Welander, T., Anoxic Biological Phosphorus Removal in a Full-Scale UCT Process, Wat. Res., 11(4), pp. 2719-2726 (1997)
6 Levin, G. V. et aI., Phosphate Stripping of Sewage, USA patent 4,141,822 (1979)
7 Eikelboom, I. D., Biosorption & Prevention of Bulking Sludge by Means of a High Floc Loading, Eater Research Centre, pp. 163-173 (1980)
8 전항배, 이용택, 신항식, 유기물질이 인제거 특성에 미치는 영향, 상하수도학회지, 8(2), pp. 25-34 (1994)