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

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)

Publication Information

Applied Chemistry for Engineering / v.17, no.5, 2006 , pp. 521-526 More about this Journal

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;

Citations & Related Records

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