期刊
BIORESOURCE TECHNOLOGY
卷 221, 期 -, 页码 262-269出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.09.029
关键词
Coal gasification wastewater; Pure oxygen fine bubbles; Foam control; Membrane fouling; Bacterial community evolution
资金
- public welfare technology application research project of Zhejiang province, China [2016C33108]
- national key research and development program, China [2016YFB0600500]
- international scientific and technological cooperation program of China [2014DFE90040]
A lab-scale study was investigated to evaluate the effect of pure oxygen fine bubbles on membrane bioreactor (O-2-MBR) performance of treating coal gasification wastewater. Compared with conventional MBR using aeration source of air (CMBR), the removal efficiencies of COD and total phenols increased by 28% and 36%, and the organic compositions of treated effluent represented significant difference that was mainly attributed to the controlled the foam expansion and enhanced the enzymatic activities in O-2-MBR. Moreover, membrane fouling mitigation was observed in O-2-MBR, probably owing to the less EPS amount and larger PSD. It was notable that the pure oxygen with fine bubbles promoted marked evolution of bacterial community from CMBR to O-2-MBR, particularly, the bacterial community richness and diversity in O-2-MBR was lower than CMBR, and the genera Phycisphaera, Comamonas, Thauera and Ohtaekwangia composed the top four most relative abundance genera in O-2-MBR, giving the total relative abundance of 26.7%. (C) 2016 Elsevier Ltd. All rights reserved.
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