CIESC Journal ›› 2016, Vol. 67 ›› Issue (5): 2033-2040.doi: 10.11949/j.issn.0438-1157.20151517

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Selective inhibition of methanogens using 2-bromoethanesulfonate for improvement of acetate production from CO2 in bioelectrochemical systems

QI Yujiao1,2, BRIDIER Arnaud2, DESMOND LE QUEMENER Elie2, LÜ Fan1,3, HE Pinjing1,3, BOUCHEZ Théodore2   

  1. 1 Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, China;
    2 Irstea, UR HBAN, 1 rue Pierre-Gilles de Gennes CS10030, 92761 Antony cedex, France;
    3 Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing and Urban-Rural Development of PR. China (MOHURD), Shanghai 200092, China
  • Received:2015-10-08 Revised:2015-11-26 Online:2016-05-05 Published:2015-12-03
  • Supported by:

    supported by the French Investissement d'Avenir Program (ANR-10-BTBR-02), the National Natural Science Foundation of China (21177096, 51378375), and the 111 Program.


In this study, the specific reduction of CO2 to acetate in presence of methanogenesis inhibitor 2-bromoethanesulfonate (BES) was studied in a bio-electrochemical system (BES) via a two stage experimental design. During first stage using untreated mixed anaerobic consortia, the methanogenesis was dominated and the CO2 reduction yielded methane at the maximum rate of 0.95 mmol·L-1·d-1 at nearly 55.0% coulombic recovery. Sequences belonging to the family Methanobacteriaceae were dominant at the cathodic electrode. During second stage, BES addition selectively suppressed the growth of methanogens, which resulted in a shift of the dominant activity to acetogenesis with the maximum production rate of 2.22 mmol·L-1·d-1 with a recovery of 67.3% of electrons in acetate and hydrogen after two duplicates. The main populations were Rhodocyclaceae (15.1%), Clostridiaceae (11.9%), Comamonadaceae (11.1%) and Sphingobacteriales (11.0%). This study highlighted the importance of inhibition of methanogenesis to manoeuvre microbial structures, which decided the final product profiles during a microbial electro synthesis operation.

Key words: microbial electrosynthesis systems (MES), carbon dioxide reduction, acetogenesis, 2-bromoethanesulfonate (BES), methanogenesis inhibition, control, selectivity, boiprocess

CLC Number: 

  • TQ151.5+2

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