Reductive Transformation of p-chloronitrobenzene in the upflow anaerobic sludge blanket reactor coupled with microbial electrolysis cell: performance and microbial community

Document Type

Article

Publication Date

10-1-2016

Abstract

A microbial electrolysis cell (MEC) combined with an upflow anaerobic sludge blanket (UASB) reactor was operated to degrade p-chloronitrobenzenes (p-ClNB) effectively. The results indicated that p-ClNB was transformed to p-chloroaniline (p-ClAn) and then reduced via dechlorination pathways. In the MEC-UASB coupled system, p-ClNB, p-ClAn removal efficiency and dechlorination efficiency reached 99.63 ± 0.37%, 40.39 ± 9.26% and 32.16 ± 8.12%, respectively, which was significantly improved in comparison with the control UASB system. In addition, the coupled system could maintain appropriate pH and promote anaerobic sludge granulation to exert a positive effect on reductive transformation of p-ClNB. PCR-DGGE experiment and 454 pyrophosphate sequencing analysis indicated that applied voltage would significantly influence the succession of microbial community and promote oriented enrichment of the functional bacteria, which could be the underlying reasons for the improved performance. This study demonstrated that MEC-UASB coupled system had a promising application prospect to remove the recalcitrant pollutants effectively.

Identifier

84978829827 (Scopus)

Publication Title

Bioresource Technology

External Full Text Location

https://doi.org/10.1016/j.biortech.2016.07.037

e-ISSN

18732976

ISSN

09608524

PubMed ID

27455127

First Page

1037

Last Page

1045

Volume

218

Grant

2013BAC16B04

Fund Ref

National Natural Science Foundation of China

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