Efficient 2,4-dichloronitrobenzene removal in the coupled BES-UASB reactor: Effect of external voltage mode
Efficient 2,4-dichloronitrobenzene removal in the coupled BES-UASB reactor: Effect of external voltage mode
复制标题
在耦合 BES-UASB 反应器中高效去除 2,4-二氯硝基苯：外部电压模式的影响
DOI：
10.1016/j.biortech.2017.06.010
复制
发表时间：
2017-10-01
影响因子：
11.4
通讯作者：
Zhu, Liang
中科院分区：
文献类型：
--
作者：
Chen, Hui;Gao, Xinyi;Zhu, Liang
本研究开发了生物电化学-上流式厌氧污泥床（BES-UASB）系统来处理含2,4-二氯硝基苯（DClNB）的废水，以研究不同供电模式下外部电压的影响。结果表明，当 DClNB 负载量从 25 g m(3) d(1) 增加到 100 g m(3) d(1)（水力保留时间 (HRT) 从 24 小时减少到 6 h）时，R1（施加间歇电压）和 R2（施加连续电压）中 2,4-二氯苯胺（DClAN）处于检测限以下，而在 R0（对照）中观察到 DClAN 突然积累（1.7 mg·L（1））。当HRT进一步缩短至4 h时，R0、R1和R2的脱氯效率（DE）分别下降至32.7%、45.0%和45.3%。微生物群落分析表明，与 R0 相比，R1 和 R2 中与脱氯相关的物种显着富集，例如： g., Dehalobacterand Dehalococcoides.综上所述，间歇电压BES-UASB系统是高效处理含DClNB废水的替代工艺，且能耗输入显着降低。 (C) 2017 Elsevier Ltd. 保留所有权利。
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.