期刊
BIORESOURCE TECHNOLOGY
卷 129, 期 -, 页码 655-658出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.12.043
关键词
Aerobic granules; Biofilm; Biological wastewater treatment; N-acy-L-homoserine lactone (AHL); Quorum sensing
资金
- Natural Science Foundation of China [51129803]
- Research Grants Council (RGC) [HKU714811E]
- University Grants Committee (UGC) of the Hong Kong SAR Government [SEG_HKU10]
- HKU SPACE Research Fund of The University of Hong Kong
A laboratory study was conducted to investigate the production of quorum sensing (QS) molecules by aerobic granules in membrane-partitioned bioreactor. Flow-chamber (FC) tests with Escherichia coli K12 demonstrated that granules induced more attached growth of E. coli cells than activated sludge flocs, leading to more cell adhesion and biofilm formation on the FC cover slide. Using the thin-layer chromatography, N-acy-L-homoserine lactones (AHLs) with acyl chains shorter than 10 carbons were detected in the liquid phase of granular sludge. Organic substances extracted with acidified ethyl acetate from the supernatant of granular sludge promoted the adhesion and growth of E. coli cells on the glass surface. AHL-like signal molecules were apparently produced by granules and might be involved in the formation of granules and the maintenance of granular structures during wastewater treatment. (C) 2012 Elsevier Ltd. All rights reserved.
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