Comparison of Anoxic/Oxic Membrane Bioreactor - Reverse Osmosis and Activated Sludge Process-Microfiltration-Reverse Osmosis Process for Advanced Treatment of Wastewater

폐수의 고도처리를 위한 무산소/호기형 분리막생물반응조 - 역삼투 공정과 활성슬러지공정 - 정밀여과 - 역삼투 공정의 비교

  • Roh, Sung-Hee (Department of Chemical and Biochemical Engineering, Chosun University) ;
  • Kim, Sun-Il (Department of Chemical and Biochemical Engineering, Chosun University) ;
  • Quan, Hong-hua (Department of Chemical and Biochemical Engineering, Chosun University) ;
  • Song, Yon-Ho (Department of Chemical and Biochemical Engineering, Chosun University)
  • 노성희 (조선대학교 생명화학공학과) ;
  • 김선일 (조선대학교 생명화학공학과) ;
  • 전홍화 (조선대학교 생명화학공학과) ;
  • 송연호 (조선대학교 생명화학공학과)
  • Received : 2006.07.26
  • Accepted : 2006.08.18
  • Published : 2006.10.10

Abstract

A membrane bioreactor (MBR) is an effective tool for wastewater treatment with recycling. MBR process has several advantages over conventional activated sludge process (ASP); reliability, compactness, and quality of treated water. The resulting high-quality and disinfected effluents suggest that MBR process can be suitable for the reused and recycling of wastewater. An anoxic/oxic (A/O) type MBR was applied to simultaneous removal of organics and nutrients in sewage. At first, the efficiency of submerged MBR process was investigated using a hollow fiber microfiltration membrane with a constant flux of $10.2L/m^2{\cdot}h$ at each solids retention time (SRT). Results showed that protein/carbohydrate (P/C) ratio increased and total extracellular polymeric substances (EPS) remained constant with SRT increased. Secondly, A/O type MBR with a reverse osmosis (RO) membrane was employed to treat the municipal wastewater. The performance of A/O type MBR-RO process is better for the treatment of organics and nutrients than ASP-MF-RO process in terms of consistent effluents quality.

Keywords

membrane bioreactor;microfiltration;reverse osmosis

Acknowledgement

Supported by : 조선대학교

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