Effects of polyurethane foam carrier addition on anoxic/aerobic membrane bioreactor (A/O-MBR) for coal gasification wastewater (CGW) treatment: Performance and microbial community structure

被引：20
作者：
Chen, Zhiqiang [1 ,2 ]
Li, Da [1 ]
Liu, Hongguo [1 ]
Wen, Qinxue [1 ]
机构：
[1] Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
[2] Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730070, Peoples R China
来源：
SCIENCE OF THE TOTAL ENVIRONMENT | 2021年 / 789卷
关键词：
Coal gasification wastewater; A; O-MBR; Polyurethane foam; Membrane fouling; Microbial community structure; EXTRACELLULAR POLYMERIC SUBSTANCES; OF-THE-ART; BACTERIAL COMMUNITY; POLLUTANTS REMOVAL; ACTIVATED-SLUDGE; FOULING MITIGATION; BIOFILM; DEGRADATION; PHENOL; BIOAUGMENTATION;
D O I：
10.1016/j.scitotenv.2021.148037
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Coal gasification wastewater (CGW) is a typical toxic and refractory industrial wastewater with abundant phenols contained. Two identical anoxic/aerobic membrane bioreactors (with (R2) and without (R1) polyurethane (PU) foam) were carried out in parallel to investigate the role of PU foam addition in enhancing pollutants removal in CGW. Results showed that both systems exhibited effective removal of chemical oxygen demand (>93%) and total phenols (>97%) but poor ammonia nitrogen removal (<35%) constrained by ammonia oxidation process. GC-MS analysis revealed that aromatic and other refractory intermediates were dramatically reduced in R2. Moreover, the PU addition had negligible influence on the total soluble microbial products and extracellular polymeric substances contents but significantly alleviated membrane fouling with the operating time 33% prolonged. Microbial community revealed that Flavobacterium, Holophaga, and Geobacter were enriched on PU. Influent type might be a main driver for microbial community succession. (c) 2021 Published by Elsevier B.V.
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页数：11
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