Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Coagulation-membrane separation hybrid treatment of secondary treated effluent for high efficiency phosphorus removal

하수 2차처리 방류수의 총인 고효율 처리를 위한 응집·막분리 혼성처리

  • Choi, Wookjin (Center for Water Resource Cycle Research, Korea Institute of Science and Technology) ;
  • Lee, Byungha (KG Chemical Co. Ltd.) ;
  • Park, Joonhong (School of Civil and Environmental Engineering, Yonsei University) ;
  • Cha, Hoyoung (Zignentech Co. Ltd.) ;
  • Lee, Byungchan (Department of Civil Engineering and Landscape Architecture, Suncheon Jeil College) ;
  • Song, Kyungguen (Center for Water Resource Cycle Research, Korea Institute of Science and Technology)
  • 최욱진 (한국과학기술연구원 물자원순환연구단) ;
  • 이병하 (KG 케미컬(주)) ;
  • 박준홍 (연세대학교 사회환경시스템공학부) ;
  • 차호영 (자인엔텍(주)) ;
  • 이병찬 (순천제일대학교 토목조경과) ;
  • 송경근 (한국과학기술연구원 물자원순환연구단)
  • Received : 2018.02.01
  • Accepted : 2018.02.13
  • Published : 2018.02.15
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Abstract

This study investigated phosphorus removal from secondary treated effluent using coagulation-membrane separation hybrid treatment to satisfy strict regulation in wastewater treatment. The membrane separation process was used to remove suspended phosphorus particles after coagulation/settlement. Membrane separation with $0.2{\mu}m$ pore size of micro filtration membrane could reduce phosphorus concentration to 0.02 mg P/L after coagulation with 1 mg Al/L dose of polyaluminum chloride (PACl). Regardless of coagulant, the residual concentration of phosphorus decreased as the dose increased from 1.5 to 3.5 mg Al/L, while the target concentration of 0.05 mg P/L or less was achieved at 2.5 mg Al/L for the aluminum sulfate (Alum) and 3.5 mg Al/L for PACl. Moreover, alum showed better membrane flux as make bigger particles than PACl. Alum showed a 40% of flux decrease at 2.5 mg Al/L dose, while PACl indicated a 50% decrease of membrane flux even with a higher dose of 3.5 mg Al/L. Thus, alum was more effective coagulant than PACl considering phosphorus removal and membrane flux as well as its dose. Consequently, the coagulation-membrane separation hybrid treatment could be mitigate regulation on phosphorus removal as unsettleable phosphorus particles were effectively removed by membrane after coagulation.

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References

  1. APHA-AWWA-WEF (2005). Standard methods for the examination of water and wastewater, 21st Ed., AHPA Publishing, Washington DC, pp. 4. 106-115.
  2. Banu, R.J., Do, K.U. and Yeom, I.T. (2008). Phosphorus removal in low alkalinity secondary effluent using alum, Int. J. Environ. Sci. Technol., 5(1), 93-98. https://doi.org/10.1007/BF03326001
  3. Bratby, J. (2006). Coagulation and flocculation in water and wastewater treatment, 2nd Ed., IWA Publishing, London, pp. 119-149.
  4. Chen, W., Westerhoff, P., Leenheer, J.A. and Booksh, K. (2003). Fluorescence excitation-emission matrix regional integration to quantify spectra for dissolved organic matter, Environ. Sci. Technol., 37, 5701-5710. https://doi.org/10.1021/es034354c
  5. EPA (2007). Advanced wastewater treatment to achieve low concentration of phosphorus, EPA 910-R-07-002.
  6. Gregor, J.G., Nokes, C.J. and Fenton, E. (1997). Optimising natural organic matter removal from low turbidity waters by controlled pH adjustment of aluminium coagulation, Water Res., 31, 2949-2958. https://doi.org/10.1016/S0043-1354(97)00154-1
  7. Han, H.J. and Moon, B.H. (2012). Effect of rapid mixing intensity and coagulant dosages on phosphorus removal by coagulation, Clean Technol., 18, 404-409. https://doi.org/10.7464/ksct.2012.18.4.404
  8. Han, S.W. and Kang, L.S. (2010). Removal mechanism of phosphorus in wastewater effluent using coagulation process, J. Korean Soc. Environ. Eng., 32(8), 774-779.
  9. Jung, C.W. and Son, H.J (2008). The evaluation of fouling mechanism on cross flow precoagulation-UF process, Korean Chem. Eng. Res., 46, 639-645.
  10. Leenheer, J.A. and Croue, J.-P. (2003). Peer Reviewed: Characterizing aquatic dissolved organic matter, Environ. Sci. Technol., 37, 18a-26a. https://doi.org/10.1021/es032333c
  11. Nam, S.J. (2012). Membrane fouling reduction and phosphorus removal by aluminum sulfate addition, Master's Thesis, Seoul National University, Seoul, Korea, pp. 52-53.
  12. Rittmann, B.E. and McCarty, P.L. (2002). Environmental Biotechnology, McGraw-Hill Korea, pp. 579-590.
  13. Park, W.C., Lee, M.A. and Sung, I,H. (2014). Phosphorus removal from advanced wastewater treatment process using PAC, J. Korean Soc. Environ. Eng., 36, 96-102. https://doi.org/10.4491/KSEE.2014.36.2.96
  14. Song, K.G., Kim, Y. and Ahn, K.H. (2008). Effect of coagulant addition on membrane fouling and nutrient removal in a submerged membrane bioreactor, Desalination, 221, 467-474. https://doi.org/10.1016/j.desal.2007.01.107
  15. Takacs, I., Murthy, S., Smith, S. and McGrath, M. (2006). Chemical phosphorus removal to extremely low levels: experience of two plants in the Washington, DC area, Water Sci. Techol., 53(12), 21-28.
  16. Water Environment Federation. Municipal Subcommittee and Water Environment Federation. Task Force on Biological and Chemical Systems for Nutrient Removal (1998). Biological and chemical systems for nutrient removal. Water Environment Federation, Alexandria, Virginia, pp. 23-58.
  17. Yamashita, Y. and Tanoue, E. (2003). Chemical characterization of protein-like fluorophores in DOM in relation to aromatic amino acids, Mar. Chem., 82, 255-271. https://doi.org/10.1016/S0304-4203(03)00073-2
  18. Yeoman, S., Stephenson, T., Lester, J.N. and Perry, R. (1998). The removal of phosphorus during wastewater treatment: A review, Environ. Pollut., 49(3), 183-233. https://doi.org/10.1016/0269-7491(88)90209-6