Natural solar intermittent-powered electromethanogenesis towards green carbon reduction

Biochar based cathode enriched with hydroxyapatite and Cu nanoparticles boosting electromethanogenesis

“…Several other CO2-rich industrial wastes would reach a technological upgrade towards a more circular economy by electromethanogenesis. However, important challenges concerning methane yield from this technology, still approached at the laboratory level only, are persisting [20][21][22][23]. Previous studies are mainly focused on the optimization of the chamber set-up (i.e., single, or double chamber) [2], applied cathode potential, choice of microorganisms, cathode and/or anode feeding, pH, and other process parameters [24][25][26].…”

Renewable electron-driven bioinorganic nitrogen fixation: a superior route toward green ammonia?

“…However, low power density and voltage stability are the main obstacles to the former; membrane fouling, and pumping loss are the main limitations of the latter. Solar power-driven microbial electrochemical systems have recently demonstrated that day/night intermittent solar light power can effectively enhance biogas production and regulate electron transfer protein, 72,73 although they are still in their infancy. Thus, renewable electricity production and transportation issues and stationery and portable energy needs would be the major barriers.…”

Pathways to Water Sector Decarbonization, Carbon Capture and Utilization

“…Wang et al (2020cWang et al ( , 2020d) demonstrated that natural solar light, as a day/night intermittent power, could effectively enhance CH 4 production from wastewater and regulate electron transfer protein of cytochrome c, and this study further displayed the underlying impact of solar energy to electrochemically enhanced AD. Wang et al (2022a) further developed natural solar-powered microbes to reduce CO 2 into CH 4 for efficient carbon capture. Comprehensively comparing other reported research involved in EM with CO 2 reduction to CH 4 via a biocathode (Table 13.1), it could be easily concluded that the presence of membrane has a prevalence in such systems and higher applied voltages were provided due to the occurrence of water splitting at the anode rather than the oxidation of organic matters.…”