Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7068142 | Bioresource Technology | 2018 | 7 Pages |
Abstract
For enhanced dechlorination of 2,4-dichloronitrobenzene (2,4-DClNB), a coupled microbial electrosynthesis-upflow anaerobic sludge reactor (MES-UASB) was established, and the effect of cathode potential on the performance of combined process was investigated in this study. Results showed that a higher dechlorination efficiency of 78.5â¯Â±â¯6.1% was achieved in the coupled MES-UASB at â660â¯mV, and the degradation rate of 4-chloroaniline (4-ClAn) reached 4.61â¯mg·Lâ1·dâ1 within 120â¯h at â660â¯mV of cathode potential in batch experiments. The results of Illumina sequencing indicated that the biocathode operated at a lower potential favored the enrichment of dechlorination-related microbes such as Dehalobacter, Dehalococcoides and Anaeromyxobacter both in granular sludge and cathode biofilm. It could be speculated that a lower cathode potential is more feasible for the dechlorination of 2,4-DClNB due to the enrichment of dechlorination-related microbes as well as the production of electrons with higher energy for long-distance electron transfer (LDET).
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Authors
Linlin Chen, Junjie Shao, Hui Chen, Caiqin Wang, Xinyi Gao, Xiangyang Xu, Liang Zhu,