Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Pilot-Scale Simulation of Desalination Process Using Water Integrated Forward Osmosis System

물통합형 정삼투 시스템을 이용한 파일럿 스케일 담수 공정 모사

  • Kim, Bongchul (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT)) ;
  • Hong, Seungkwan (School of Civil, Environmental & Architectural Engineering, Korea University) ;
  • Choi, Juneseok (Environmental and Plant Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT))
  • 김봉철 (한국건설기술연구원 환경.플랜트연구소) ;
  • 홍승관 (고려대학교 건축사회환경공학부) ;
  • 최준석 (한국건설기술연구원 환경.플랜트연구소)
  • Received : 2017.05.27
  • Accepted : 2017.07.03
  • Published : 2017.07.30
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Abstract

In these days, wastewater reclamation and seawater desalination play essential role in addressing the challenge of worldwide water scarcity. Particularly, reverse osmosis (RO) for seawater desalination process is commonly used due to less energy consumption than conventional thermodynamic systems. However, membrane fouling and electrical energy consumption during operation of RO system for seawater desalination haver continued to be a obstruction to its application. In this study, therefore, wastewater secondary effluent is used for osmotic dilution of seawater. Firstly, fouling behaviour of RO by simulating wastewater effluent in osmotic dilution process was measured and we calculated energy consumption of overall desalination process by theoretical equations and commercial program. Our results reveal that RO membrane fouling can be efficiently controlled by pre-treatment systems such as nano filtration (NF) or forward osmosis (FO) process. Especially FO system for osmotic dilution process is a non-pressurized membrane system and, therefore, the operating energy consumption of overall desalination system was the lowest. Moreover, fouling layer on FO membrane is comparatively weak and reversible enough to be disrupted by physical cleaning. Thus, RO system with low salinity feed water through FO process is possible as a less energy consuming desalination system with efficient membrane fouling control.

Keywords

References

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