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Parameters affecting acetate concentrations during in-situ biological hydrogen methanation.

07:00 EST 24th February 2018 | BioPortfolio

Summary of "Parameters affecting acetate concentrations during in-situ biological hydrogen methanation."

Surplus electricity may be supplied to anaerobic digesters as Hgas to upgrade the CHcontent of biogas. Acetate accumulation has been observed following Hinjections, but the parameters determining the degree of acetate accumulation are not well understood. The pathways involved during Hconsumption and acetate kinetics were evaluated in continuous lab reactors and parallel batchC experiments. Acetate accumulation increased during initial Hinjections as organic loading rate increased and COlevels decreased below 7%. The share of CHin HandC mass balances increased after repeated Hinjections, which corresponded with the increase of Methanomicrobiales observed via qPCR. The organic loading rate, the inorganic carbon level and level of methanogen adaption hence determine acetate kinetics during biomethanation of H. The three identified parameters may form the base of a decision tool to assess acetate accumulation during Hinjections to an anaerobic digester.

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Name: Bioresource technology
ISSN: 1873-2976
Pages: 33-40

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