期刊
WATER RESEARCH
卷 137, 期 -, 页码 355-361出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2018.03.011
关键词
Osmotic membrane bioreactor; Membrane fouling; Synchrotron infrared mapping; Micro X-ray computed tomography; Fouling distribution; Foulant penetration
资金
- National Natural Science Foundation of China [51708547]
- Australia Synchrotron [AS171/IRM/11715]
- Victoria University for Vice Chancellor Early Career Research Fellowship
- Australia Endeavour Cheung Kong Fellowship
- Australian Research Council through the Centre of Excellence in Advanced Molecular Imaging
We employed synchrotron infrared (IR) mapping to resolve forward osmosis (FO) membrane fouling in osmotic membrane bioreactor (OMBR). Synchrotron IR mapping offers a unique perspective to elucidate the fouling mechanisms and associated consequences in OMBR operation. We demonstrated the spatial distribution and relative intensity of carbohydrate and protein longitudinally along of the fouled FO membrane at the conclusion of OMBR operation. Both transmission and attenuated total reflection (ATR) modes were used to map the cross-section and surface of the fouled FO membrane. Micro X-ray computed tomography revealed patchy, sand-dune features on the membrane surface at the conclusion of OMBR operation. Synchrotron IR-ATR mapping demonstrated that the development of membrane fouling layer in OMBR operation was initiated by polysaccharide-like carbohydrate, followed by layering with protein-like substance, resulting in a characteristic sand-dune three dimensional feature. Synchrotron FTIR mapping shed light on foulant occurrence and accumulation in the draw solution. Strong penetration of protein-like substance into membrane matrix was visualised, resulting the detection of protein adsorption in the region of membrane supporting layer. (C) 2018 Elsevier Ltd. All rights reserved.
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