Bioelectrochemical Power-to-Gas: State of the Art and Future Perspectives.

Bioelectrochemical power-to-gas (BEP2G) is considered a potentially convenient way of storing renewable surplus electricity in the form of methane. In methane-producing bioelectrochemical systems (BESs), carbon dioxide and electrical energy are converted into methane, using electrodes that supply either electrons or hydrogen to methanogenic archaea. This review summarizes the performance of methane-producing BESs in relation to cathode potential, electrode materials, operational strategies, and inoculum.

Microbial community analysis of a methane-producing biocathode in a bioelectrochemical system.

A methane-producing biocathode that converts CO(2) into methane was studied electrochemically and microbiologically. The biocathode produced methane at a maximum rate of 5.1 L CH(4)/m(2) projected cathode per day (1.