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DOI : 10.17640/KSWST.2017.25.3.65 ,    Vol.25, No.3, 65 ~ 72, 2017
Title
Influence of Operating Modes of Membrane Bioreactor on Membrane Filtration
이형옥 Hyeong-ok Lee , 현길수 Kil-soo Hyun
Abstract
Membrane fouling is complicated with physicochemical interactions among membrane bioreactor (MBR) components of membrane and module configuration, system operation and various mixed liquor components. In this study, the performances of MBR using stirred dead end filtration cell on pollutants removal with filtration modes in wastewater. Batch tests were carried out with real wastewater taken from the aeration tank of real activated sludge process. Influent concentrations were in the range of COD 30-103mg/L, MLSS <10,000mg/L, UV254 <0.3cm-1, and dissolved organic carbon (DOC) <45 mg/L. Applied membrane permeate flux was < 20 L/m2.h. As a result, MBR process achieved the high removal for COD, T-P and DOC with removal efficiencies of >90%, 70%, and 70% while it achieved a relative low removal for T-N with removal efficiencies of 50%. Longer filtration time increased TMP by accelerating membrane fouling due to the deposit of particulates on the surface of the membrane as well as the increase of total filtration resistance.
Key Words
Membrane bioreactor, membrane filtration process, operating mode, TMP, resistance
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