Browse

Characterization of biofilm structure and its effect on membrane permeability in MBR for dye wastewater treatment

Cited 156 time in Web of Science Cited 183 time in Scopus
Authors
Yun, Mi-Ae; Yeon, Kyung-Min; Park, Jong-Sang; Lee, Chung-Hak; Chun, Jongsik; Lim, Dong Joon
Issue Date
2006-01
Citation
Water Research, Vol.40 No.1, pp.45-52
Keywords
MBRdissolved oxygendye wastewaterbiofilm structureporositymembrane filterability
Abstract
Two membrane bioreactors were operated at aerobic (DO=6.0mg/L) and anoxic (DO < 0.3mg/L) conditions for the treatment of synthetic dye wastewater to determine the effect of dissolved oxygen on membrane filterability. The rate of membrane fouling for the anoxic MBR was five times faster than that for the aerobic MBR. Differences in the nature of the biofilm that was formed on the membrane surface as the result of different DO level was the main factor in the different fouling rates. The biofilm structure was characterized using digital image analysis techniques. Biofilm images were obtained using confocal laser scanning microscopy (CLSM) at various operation points. Structural parameters were then computed from these images using an image analysis software (ISA-2). The structural parameters indicated that the anoxic biofilm was thinner than the aerobic biofilm but the anoxic biofilm was spread out on the membrane surface more uniformly and densely, resulting in the higher membrane fouling. Based on the extracellular polymeric substances (EPS) visualization and quantification, it was also found that EPS, key membrane foulants were spread out more uniformly in the anoxic biofilm in spite of lower amount of EPS compared to that in the aerobic biofilm. (c) 2005 Elsevier Ltd. All rights reserved.
ISSN
0043-1354
URI
https://hdl.handle.net/10371/166024
DOI
https://doi.org/10.1016/j.watres.2005.10.035
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Natural Sciences (자연과학대학)Dept. of Biological Sciences (생명과학부)Journal Papers (저널논문_생명과학부)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse