Enhanced methane production and organic matter removal from tequila vinasses by anaerobic digestion assisted via bioelectrochemical power-to-gas

[Display omitted] •Bioelectrochemical UASB reactor is developed to treat tequila vinasses.•High methane production from tequila vinasses was achieved by electro-methanogenesis.•Methane production and organic removal was improved at a voltage input of 0.5 V.•High carbon dioxide reduction was observed...

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Bibliographic Details
Published in:Bioresource technology 2021-01, Vol.320 (Pt A), p.124344-124344, Article 124344
Main Authors: Estrada-Arriaga, Edson Baltazar, Reynoso-Deloya, Ma. Guadalupe, Guillén-Garcés, Rosa Angélica, Falcón-Rojas, Axel, García-Sánchez, Liliana
Format: Article
Language:English
Subjects:
Anaerobic digestion
Anaerobiosis
Bioelectrochemical power-to-gas
Bioelectrochemical UASB reactor
Bioreactors
Methane
Methane production
Sewage
Tequila vinasses
Waste Disposal, Fluid
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Summary:[Display omitted] •Bioelectrochemical UASB reactor is developed to treat tequila vinasses.•High methane production from tequila vinasses was achieved by electro-methanogenesis.•Methane production and organic removal was improved at a voltage input of 0.5 V.•High carbon dioxide reduction was observed in bioelectrochemical UASB reactor.•Bioelectrochemical reactions improved the conventional anaerobic digestion. In this study, showed a strategy to generate methane and remove organic matter removal from tequila vinasses through of anaerobic digestion assisted via bioelectrochemical power to-gas. Specific methanogenic activity (SMA) assays in batch mode were tested and a single-stage bioelectrochemical upflow anaerobic sludge blanket reactor (UASB) was evaluated to generate methane during tequila vinasses treatment. The results showed that the methane production in the bioelectrochemical UASB reactor applied at low voltage of 0.5 V and under HRT of 7 d was higher than the in the conventional UASB reactor. The specific methane production rate in bioelectrochemical UASB reactor was up to 2.9 NL CH4/L d, with a maximum methane yield of 0.32 NL CH4/g CODremoved. Similar COD removals were observed in the bioelectrochemical UASB reactor and conventional reactors (92–93%). High carbon dioxide reduction and hydrogen production were observed in the bioelectrochemical UASB reactor.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2020.124344