Research on Controlling MBR Membrane Fouling by Electro-Coagulation

doi:10.12068/j.issn.1005-3026.2016.03.025

Abstract

Abstract: Filtration characteristics of the submerged electric coagulation membrane bioreactor(SECMBR) membrane was investigated， function and mechanism of controlling MBR membrane fouling by electrocoagulation was discussed. The results show that the extracellular polymers (EPS)， soluble microbial products (SMP)， ζ potential and sludge particle size are the important influence factors of membrane fouling. Membrane fouling of SECMBR is much less than that of SMBR. In the SECMBR， the in situ dissolved iron ion combines with EPS which can enhance flocculation and alleviate pollution of cake layer. Electrocoagulation can reduce SMP and EPS secreted by unit volume activated sludge in SECMBR， and alleviate membrane pollution. SECMBR reduces the proportion of protein which is main pollution in EPS and SMP， and reduces membrane pollution. ζ potential has a negative correlation with R_c. Correlation degree is -0.7988 and -0.5574 in SMBR and SECMBR. Under the effect of electric field and iron ion， the ζ potential absolute value is reduced， and membrane pollution is alleviated.

Key words: membrane bioreactor (MBR), electrocoagulation, membrane fouling, correlation, ζ potential

CLC Number:

TB43

QIAN Guang-sheng， HU Xiao-min， CHEN Wen-xi， QI Chong-yang. Research on Controlling MBR Membrane Fouling by Electro-Coagulation[J]. Journal of Northeastern University Natural Science, 2016, 37(3): 421-425.

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