한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제37권6호
  • /
  • Pages.433-441
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  • 2021
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  • 2289-0971(pISSN)
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  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
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중수 재이용을 위한 오존 고도산화 및 세라믹 분리막 일체형 공정의 최적화 연구

Optimization of an Advanced Oxidation with Ozone and Ceramic Membrane Integrated Process for Greywater Reuse

  • 이종훈 (한국건설기술연구원 환경연구본부) ;
  • 노호정 (한국건설기술연구원 환경연구본부) ;
  • 박광덕 (한국건설기술연구원 환경연구본부) ;
  • 우윤철 (한국건설기술연구원 환경연구본부)
  • Lee, Jonghun (Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT)) ;
  • Rho, Hojung (Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT)) ;
  • Park, Kwang Duck (Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT)) ;
  • Woo, Yun Chul (Department of Environmental Research, Korea Institute of Civil Engineering and Building Technology (KICT))
  • 투고 : 2021.08.31
  • 심사 : 2021.10.12
  • 발행 : 2021.11.30
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초록

The aim of this study was to optimize the ozonation and ceramic membrane integrated process for greywater reclamation. The integrated process is a repeated sequential process of filtration and backwash with the same ceramic membrane. Also, this study used ozone and oxygen gas for the backwashing process to compare backwashing efficiency. The study results revealed that the optimum filtration and backwash time for the process was 10 minutes each when comparing the filtrate flow and membrane recovery rate. The integrated process was operated at three different operating conditions with i) 10 minutes for filtration and 10 minutes for ozonation, ii) 10 minutes for filtration and 10 minute for oxygen aeration, and iii) continuous filtration without any aeration for synthetic greywater. The integrated process with ozone backwashing could produce 0.55 L/min of filtrate with an average of 18.42% permeability recovery, while the oxygen backwashing produced 0.47 L/min and 6.26%, respectively. And without any backwashing, the integrated process could produce 0.29 L/min. This shows that the ozone backwash process is capable of periodically recovering from membrane fouling. The resistance of the fouled membrane was approximately 34.4% for the process with ozone backwashing, whereas the resistance was restored by 10.8% for the process with oxygen backwashing. Despite the periodical ozone backwashing and chemical cleaning, irreversible fouling gradually increased approximately 3 to 4%. Approximately 97.6% and 15% turbidity and TOC were removed by ceramic membrane filtration, respectively. Therefore, the integrated process with ozonation and ceramic membrane filtration is a potential greywater treatment process.

키워드

과제정보

본 연구는 한국건설기술연구원 기관고유임무형사업의 연구비지원에 의해 수행되었습니다((20210156-001) (21주요-대1-임무)스마트시티 분산형 물재생 시스템 개발(3/3)).

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