Efficient 2,4-dichloronitrobenzene removal in the coupled BES-UASB reactor: Effect of external voltage mode

被引：27
作者：
Chen, Hui [1 ]
Gao, Xinyi [1 ]
Wang, Caiqin [1 ]
Shao, Junjie [1 ]
Xu, Xiangyang [1 ,2 ]
Zhu, Liang [1 ,2 ]
机构：
[1] Zhejiang Univ, Dept Environm Engn, 866 Yuhangtang Rd, Hangzhou 310058, Zhejiang, Peoples R China
[2] Zhejiang Prov Key Lab Water Pollut Control & Envi, Hangzhou 310058, Zhejiang, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2017年 / 241卷
基金：
中国国家自然科学基金;
关键词：
Chloronitrobenzene Bioelectrochemical system (BES); Upflow anaerobic sludge blanket (UASB); External voltage mode; Microbial community; ANAEROBIC SLUDGE BLANKET; ELECTROLYSIS CELL MEC; WASTE-WATER; P-CHLORONITROBENZENE; REDUCTIVE TRANSFORMATION; MICROBIAL COMMUNITY; BIOELECTROCHEMICAL SYSTEM; AMBIENT-TEMPERATURE; DEGRADATION; DECHLORINATION;
D O I：
10.1016/j.biortech.2017.06.010
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In this study, bioelectrochemical-upflow anaerobic sludge blanket (BES-UASB) system was developed for treatment of 2,4-dichloronitrobenzen (DClNB) containing wastewater to investigate the effect of external voltage with different supplying modes. Results showed that 2,4-dichloroaniline (DClAN) was under detection limit in R1 (applied with intermittent voltage) and R2 (applied with continuous voltage) when the DClNB loading increased from 25 to 100 g m(3) d(1) (hydraulic retention time (HRT) was decreased from 24 to 6 h) while sudden accumulation of DClAN (1.7 mg L (1)) was observed in R0 (control). Dechlorination efficiency (DE) decreased to 32.7%, 45.0% and 45.3% in R0, R1 and R2 when HRT was further shortened to 4 h. Microbial community analysis indicated the significant enrichment of dechlorination-related species in R1 and R2 compared with R0, e. g., Dehalobacterand Dehalococcoides. In summary, the BES-UASB system with intermittent voltage is an alternative process for efficient treatment of DClNB containing wastewater, and the energy input was reduced markedly. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：879 / 886
页数：8
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