Journal
BIORESOURCE TECHNOLOGY
Volume 202, Issue -, Pages 50-58Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.11.087
Keywords
Osmotic membrane bioreactor; Cellulose triacetate; Thin-film composite; Forward osmosis; Biofouling
Funding
- Major Science and Technology Program for Water Pollution Control and Treatment of China [2012ZX07503-002]
- National Natural Science Foundation of China [21107035, 51578265]
- Fundamental Research Funds for the Central Universities [JUSRP51512]
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There are two types of popular forward osmosis (FO) membrane materials applied for researches on FO process, cellulose triacetate (CTA) and thin film composite (TFC) polyamide. However, performance and fouling mechanisms of commercial TFC FO membrane in osmotic membrane bioreactors (OMBRs) are still unknown. In current study, its biofouling behaviors in OMBRs were investigated and further compared to the CTA FO membrane. The results indicated that beta-D-glucopyranose polysaccharides and microorganisms accounted for approximately 77% of total biovolume on the CTA FO membrane while beta-D-glucopyranose polysaccharides (biovolume ratio of 81.1%) were the only dominant biofoulants on the TFC FO membrane. The analyses on the biofouling structure implied that a tighter biofouling layer with a larger biovolume was formed on the CTA FO membrane. The differences in biofouling behaviors including biofoulants composition and biofouling structure between CTA and TFC FO membranes were attributed to different membrane surface properties. (C) 2015 Elsevier Ltd. All rights reserved.
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