In-situ biomethanation of high CO content syngas in agricultural biogas digesters

Donya Kamravamanesh, Johanna M. Rinta-Kanto, Antti Myllärinen, Mikko Saalasti, Jukka Rintala and Marika Kokko

Renewable Energy, 2024, vol. 232, issue C

Abstract: To meet global energy demands, syngas with high CO content (>50 %) generated from hydrothermal gasification of agricultural residues or wood, could be utilized as a co-substrate in anaerobic digestion (AD) processes for conversion into CH4. This study investigated in-situ biomethanation using synthetic gas (55 % CO, 35 % H2, and 15 % CO2), mimicking wood gasification syngas, during AD of cow manure, the most abundant agricultural waste. A continuously stirred tank reactor (CSTR) served as a control and was fed only cow manure, while the other two reactors were fed syngas with or without gas recirculation at different gas loading rates (GLRs).

Keywords: In-situ syngas biomethanation; Wood gasification syngas; Cow manure; CO conversion efficiency; CO inhibition; Agricultural digesters (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:232:y:2024:i:c:s0960148124011248

DOI: 10.1016/j.renene.2024.121056

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