Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Application of MBR process for the treatment of RO concentrate from wastewater reuse process

하수재이용 공정에서 발생되는 RO농축수 처리를 위한 MBR 공정 적용

  • Lee, Do-Hun (Department of Environmental Engineering and Energy, Myongji University) ;
  • Jang, Hyun-Ji (Department of Environmental Engineering and Energy, Myongji University) ;
  • Kim, Han-Seung (Department of Environmental Engineering and Energy, Myongji University)
  • 이도헌 (명지대학교 환경에너지공학과) ;
  • 장현지 (명지대학교 환경에너지공학과) ;
  • 김한승 (명지대학교 환경에너지공학과)
  • Received : 2013.02.08
  • Accepted : 2013.06.10
  • Published : 2013.06.15
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Abstract

Biological treatment of RO concentrate from wastewater reuse process is known to be very difficult due to its high concentration of non-degradable organics and salt ions such as chloride, nitrate and phosphate. In this research, the treatment performance of MBR was examined using RO concentrate mixed with raw wastewater as the influent of MBR. Addition of PAC (powdered activated carbon) to MBR was also evaluated in order to enhance the treatment performance and stability. The performance of MBR for treating only RO concentrate decreased gradually although external carbon source was added. The average removal performance of MBR with and without PAC decreased from 99.1 %(98.8 %) to 94.9 %(91.4 %) for COD, 81.3 %(80.3 %) to 42.0 %(41.9 %) for T-N and 57.3(55.0 %) to 30.0 %(21.0 %) for T-P with the increase of RO concentrate mixing rate of 0 % to 20 % in the feed water. Addition of PAC showed positive effect on the performance of MBR for the removal of COD and phosphorus in case that the ratio of RO concentrate to feed water increased.

Keywords

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