Abstract
Upgrading biogas into biomethane broadens its applications and increases the value of biogas. Among these, in situ CO2-to-CH4 bioconversion can capture endogenous CO2 directly from the biogas reactor, is easy to operate, and provides infrastructure for renewable electricity storage. Although promising, several intrinsic challenges need to be addressed to move in situ upgrading technologies closer to scaled-up application. In situ CO2-to-CH4 bioconversion powered by renewable electricity could integrate multidisciplinary approaches including wind or solar energy technology, P2G technology, anaerobic digestion technology, and biogas upgrading technology. Bioelectrochemical systems are a potential technology for biogas upgrading and storing discontinuous wind/solar energy. However, their operating mechanism and scale-up feasibilities need to be further explored.
Info
Journal Article, 2021
UN SDG Classification
DK Main Research Area
Science/Technology
