Biological conversion of carbon monoxide and hydrogen by anaerobic culture: Prospect of anaerobic digestion and thermochemical processes combination

0559876 - ÚŽFG 2023 RIV US eng J - Journal Article
Andreides, D. - Olša Fliegerová, Kateřina - Pokorná, D. - Zábranská, J.
Biological conversion of carbon monoxide and hydrogen by anaerobic culture: Prospect of anaerobic digestion and thermochemical processes combination.
Biotechnology Advances. Roč. 58, SEP 2022 (2022), č. článku 107886. ISSN 0734-9750. E-ISSN 1873-1899
Institutional support: RVO:67985904
Keywords : Anaerobic digestion * Biological conversion * Methane * Syngas * Pyrogas * Thermochemical processes
OECD category: Microbiology
Impact factor: 16, year: 2022
Method of publishing: Limited access
https://asep.lib.cas.cz/arl-cav/cs/csg/?repo=crepo1&key=54750930488

Waste biomass is considered a promising renewable energy feedstock that can be converted by anaerobic digestion. However, anaerobic digestion application can be challenging due to the structural complexity of several waste biomass kinds. Therefore, coupling anaerobic digestion with thermochemical processes can offset the limitations and convert the hardly biodegradable waste biomass, including digestate residue, into valueadded products: syngas and pyrogas (gaseous mixtures consisting mainly of H-2, CO, CO2), bio-oil, and biochar for further valorisation. In this review, the utilisation boundaries and benefits of the aforementioned products by anaerobic culture are discussed. First, thermochemical process parameters for an enhanced yield of desired products are summarised. Particularly, the microbiology of CO and H-2 mixture biomethanation and fermentation in anaerobic digestion is presented. Finally, the state-of-the-art biological conversion of syngas and pyrogas to CH4 mediated by anaerobic culture is adequately described. Extensive research shows the successful selective biological conversion of CO and H-2 to CH4, acetic acid, and alcohols. The main bottleneck is the gas-liquid mass transfer which can be enhanced appropriately by bioreactors' configurations. A few research groups focus on biooil and biochar addition into anaerobic digesters. However, according to the literature review, there has been no research for utilising all value-added products at once in anaerobic digestion published so far. Although synergic effects of such can be expected. In summary, the combination of anaerobic digestion and thermochemical processes is a promising alternative for wide-scale waste biomass utilisation in practice.
Permanent Link: https://hdl.handle.net/11104/0333491