QI Yujiao, BRIDIER Arnaud, DESMOND LE QUEMENER Elie, et al. Selective inhibition of methanogens using 2-bromoethanesulfonate for improvement of acetate production from CO2 in bioelectrochemical systems[J]. CIESC Journal, 2016, (5): 2033-2040. DOI: 10.11949/j.issn.0438-1157.20151517.
QI Yujiao, BRIDIER Arnaud, DESMOND LE QUEMENER Elie, et al. Selective inhibition of methanogens using 2-bromoethanesulfonate for improvement of acetate production from CO2 in bioelectrochemical systems[J]. CIESC Journal, 2016, (5): 2033-2040. DOI: 10.11949/j.issn.0438-1157.20151517.DOI:
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.