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DOI : 10.17640/KSWST.2015.23.1.97 ,    Vol.23, No.1, 97 ~ 104, 2015
Title
Effective Improvement of Efficiency and Resistance of Membrane Filtration in Membrane Bioreactor
이형옥 Hyeong Ok Lee , 현길수 Kil Soo Hyun
Abstract
This study was performed to improve the flux and filtration resistance of membrane by reducing fouling due to effective water circulation in membrane bioreactor. Applied stirring rate for membrane stirring-cell with effective volume of 300mL ranged from 0 to 400 rpm. MLSS concentration in the membrane bioreactor was in the range of 1400 to 4000 mg/L. As a results, the increase of stirring rate and MLSS concentration increased TMP and the concentrations of particle matter and dissolved organic matter with a slightly increase of capillary suction time(CST) and flux. Filtration resistance of membrane increased with the increase of MLSS concentration, whereas it decreased with the increase of stirring rate. This indicates that the increase of shear force on the surface of membrane due to rapid stirring rate resulted in the control of membrane fouling due to detachment of particulate and dissolved organic matter generated from sludge. These indicate a suitable shear force and MLSS concentration should be considered to be cost-effective operation of membrane bioreactor.
Key Words
Membrane bioreactor, Filtration, Fouling, Shear force, Filtration resistance, Particulate and dissolved organic matter
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