Neuer Zeitschriftenbeitrag von Bajón Fernández et al. 2017

Energy consumption of the water sector presents an increasing energy demand, contrary to GHG mitigation aims. As a result, research aimed at capturing emitted CO 2 and at developing treatment technologies with a low energy demand and increased renewable energy production has increased, leading to a surge in implementation of anaerobic digestion (AD). Valorization of the biogenic CO 2 emitted with biogas AD (estimated at over 1 MtCO 2 per annum for the UK water and organic waste sectors), presents an opportunity to further reduce carbon footprint and support energy supply decarburization. This paper reviews bioconversion of CO 2 into CH 4 in ADs (without addition of H 2 ) as a means to valorize CO 2 emissions. The review has concluded this to be a promising solution to reduce carbon footprint and uplift renewable energy production. However, in order to increase readiness for implementation (1) the mechanisms of CO 2 utilization need to be elucidated, including the sources of additional H 2 needed, (2) studies need to report more thoroughly the conditions of CO 2 injection and (3) trials where ADs are integrated with gas to liquid mass transfer technologies need to be performed.

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