Journal
BIORESOURCE TECHNOLOGY
Volume 244, Issue -, Pages 1121-1128Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.08.121
Keywords
Extractive membrane bioreactor; Phenol removal; Extracellular polymeric substance; Microbial community dynamics; High-throughput sequence
Funding
- National Natural Science Foundation of China [21577089]
- Major Science and Technology Program for Water Pollution Control and Treatment [2014ZX07206001]
- National Research Foundation Singapore under its Campus for Research Excellence and Technological Enterprise (CREATE)
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An extractive membrane bioreactor (EMBR) for phenol-laden saline wastewater was set up in this study to investigate the variations of phenol removal, extracellular polymeric substance (EPS) release and microbial community dynamics. The gradual release of phenol and the total separation of salt were achieved by silicon rubber tube membrane. Only phenol (55.6-273.9 mg/L) was extracted into microorganism unit from waste-waters containing 1.0-5.0 g/L phenol and 35.0 g/L NaCl. After 82 d of EMBR operation, maximal 273.9 mg/L of phenol was removed in EMBR. Low concentration of phenol in wastewater (2.5 g/L) played a favorable effect on the microbial community structure, community and dynamics. The enumeration of Proteobacteria (30,499 sequences) significantly increased with more released EPS (82.82 mg/gSS) to absorb and degrade phenol, compared to the virgin data without phenol addition. However, high concentration of phenol showed adverse effects on EPS release, microbial abundance and biodiversity.
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