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Journal Articles Bioresource Technology Year : 2014

Forming microbial anodes with acetate addition decreases their capability to treat raw paper mill effluent

Abstract

Microbial anodes were formed under polarization at −0.3 V/SCE on graphite plates in effluents from a pulp and paper mill. The bioanodes formed with the addition of acetate led to the highest current densities (up to 6 A/m2) but were then unable to oxidize the raw effluent efficiently (0.5 A/m2). In contrast, the bioanodes formed without acetate addition were fully able to oxidize the organic matter contained in the effluent, giving up to 4.5 A/m2 in continuous mode. Bacterial communities showed less bacterial diversity for the acetate-fed bioanodes compared to those formed in raw effluents. Deltaproteobacteria were the most abundant taxonomic group, with a high diversity for bioanodes formed without acetate addition but with almost 100% Desulfuromonas for the acetate-fed bioanodes. The addition of acetate to form the microbial anodes induced microbial selection, which was detrimental to the treatment of the raw effluent.
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Dates and versions

hal-01894355 , version 1 (12-10-2018)

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Françoise Ketep, Alain Bergel, Marie Bertrand-Huleux, ​mohamed Barakat, Wafa Achouak, et al.. Forming microbial anodes with acetate addition decreases their capability to treat raw paper mill effluent. Bioresource Technology, 2014, 164, pp.285-291. ⟨10.1016/j.biortech.2014.04.088⟩. ⟨hal-01894355⟩
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