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Effect of Advanced Wastewater Treatment by Variations Operating Conditions of 4-stage Intermittently Aerated Activated Sludge process

4단 간헐포기 공정의 운전조건이 고도처리에 미치는 영향

  • Choi, Yong-Bum (Dept. of Environmental Engineering Kangwon National University) ;
  • Lee, Jeong-Gyu (Dept. of Environmental Engineering Kangwon National University) ;
  • Han, Dong-Joon (Dept. of Fire·Environmental & Gangwon Provincial College) ;
  • Kwon, Jae-Hyouk (Dept. of Environmental Engineering Kangwon National University)
  • 최용범 (강원대학교 환경공학과) ;
  • 이정규 (강원대학교 환경공학과) ;
  • 한동준 (강원도립대학 소방환경방재과) ;
  • 권재혁 (강원대학교 환경공학과)
  • Received : 2012.10.24
  • Accepted : 2013.02.06
  • Published : 2013.02.28

Abstract

An evaluation of the organic matter removal efficiency showed high removal efficiencies of 91.1~96.3% and 91.4~97.5% for TCODcr and TBOD5, respectively, for 9hr or longer of HRT. However, the removal efficiencies decreased to 86.9~90.5% and 88.0~90.9%, respectively for 6hr of HRT. $NH_3$-N showed a high removal efficiency of 95% or higher for 9hr or longer of HRT. The total nitrogen removal efficiency was 67.6~76.7% for 9~12hr of HRT, and it decreased to 50% for 6hr of HRT, which seems to be due to the insufficient carbon source required for denitrification. The T-P removal efficiency was 32% on average. To comply with the legal standards, a chemical phosphorus removal process is needed after the reactor.

본 연구는 간헐포기 공정을 이용하여 생활하수의 고도처리 효율을 증진시키는 방안을 제시하고자 수행되었다. 운전기간동안 유기물 제거효율 검토 결과, HRT 9hr 이상에서 TCODcr와 TBOD의 제거효율은 각각 91.1~96.3%와 91.4~97.5%로 높은 제거효율을 나타냈으나, HRT가 6hr에서는 각각 86.9~90.5%, 88.0~90.9%로 제거효율이 감소된 것으로 조사되었다. $NH_3$-N은 HRT 9hr 이상에서는 95% 이상의 높은 제거효율을 나타냈으며, T-N 제거효율은 HRT 9~12hr에서 67.6~76.7%, HRT 6hr에서는 50%로 감소되었는데 이는 탈질에 필요한 탄소원이 부족하기 때문이다. 운전기간동안 T-P 제거효율은 평균 32%로 낮게 조사되었는데 강화되는 법적기준을 준수하기 위해서는 반응조 후단에 화학적 인 제거 공정이 필요한 것으로 사료된다.

Keywords

References

  1. Kaejoon Woo, Hyosoo Kim, et al., "Development and Evaluation of Model-based Predicitive Control Algorthm for Effluent $NH_4-N$-N in $A^2/O$ Process", Journal of Korean Society of environmental Engineers, Vol. 33, No. 1, pp. 25-31, 2011. https://doi.org/10.4491/KSEE.2011.33.1.025
  2. Kwan-Yong Lee, Chaang-Seock Choi, et al., "Control of the Aeration and Non-Aeration Periods by the Utilization of Dissolved Oxygen Profile at a sequence Batch Reactor(SBR)", Journal of Korean Society of environmental Engineers, Vol. 25, No. 8, pp. 1032-1037, 2003.
  3. Won-Ho Lee, In-Seok Seo, et al., "Simultaneous Removal of Nitrogen and Phosphorus in Swine Wastewater by 4-stage intermittently Aerated Activated Sludge System", J. KSWQ, Vol. 13, No. 3, pp. 331-338, 1997.
  4. APWA, AWWA, and WPCF, "Standard Methods for the Examination of Water and Wastewater", 20th ed. 1999.
  5. Songming Zhu, Shulin Chen, "Effects of organic carbon on nitrification rate in fixed film biofilters", Aquacultural Engineering, Vol. 25, pp. 1-11, 2001. DOI: http://dx.doi.org/10.1016/S0144-8609(01)00071-1
  6. Painter, H. A., "Microbial Transformations of Inorganic Nitrogen", Prog. Wat. Tech, 8(4/5), pp. 3-29, 1977.
  7. Ralph, L. E.c et al., "RBC for BOD and Ammonia Nitrogen Removals at Princeton Wastewater Treatment Plant", Proc. 1st Intern. Conf. on Fixed-film Biological Process, 2, pp. 590-616, 1982.
  8. John, A. H., and Roy, D. M., "Operational Problems with Rotary Biological Contactors", JWPCF, Vol. 53, No. 8, pp. 1283-1293, 1981.
  9. Randolph, G. D., and Yu, T. S., "Assessments of Kinetic Performance of a Rotating Biological Contacter System", Proc. 1st Intern, Conf. on Fixed-film Biological Process, 1, pp. 233-260, 1982.
  10. Ekama, G. A., and Marais, G. V. R., "Theory, Design and Operation of Nutrient Removal Activated Sludge Processes", Water Research Commission, Pretoria, South Africa, 1984.
  11. Cheng, W. P., Chi, F. H. and Yu, R. F., "Effect of phosphate on removal of humic substances by aluminum sulfate coagulant", Colloid and Interface Sci, Vol. 272, pp. 153-157, 2004. DOI: http://dx.doi.org/10.1016/j.jcis.2003.08.074
  12. Choi, H. J., Lee, S. M., "Characteristics of biological phosphorus removal in the MBR", Journal of Korean Society of environmental Engineers, Vol. 29, No. 2, pp. 197-204, 2007.