Production of Acetate from Carbon Dioxide in Bioelectrochemical Systems Based on Autotrophic Mixed Culture

Bio-electrocatalytic reduction of CO2: Enrichment of homoacetogens and pH optimization towards enhancement of carboxylic acids biosynthesis

“…The cathode chamber of both BES B and BES C was inoculated with the enriched homoacetogenic culture set at pH 10 from stage-II. Initially, BES was operated using sodium bicarbonate as carbon source in the cathode chamber of BES B and BES C , respectively under an applied potential of À0.8 V vs Ag/Agcl (S) [41,42] to evaluate the acetic acid production. Acetic acid (C2) production was observed to start during 4 h and a gradual increment in acetic acid concentration was noticed up to 24 h and 32 h followed by a decrement till the end of cycle in BES B and BES C respectively.…”

Electro-Fermentation in Aid of Bioenergy and Biopolymers

“…This may allow water recirculation in biorefinery and alleviate the use of fresh water [105]. Co-production of various biofuels and organic compounds using wastes and CO 2 as direct substrates indicates the promising future with MFC based technologies [58,[76][77][78]84]. Similarly, an electrodialysis system was used to extract the organic acids produced during dark fermentation of glucose for H 2 production by Escherichia coli.…”

Carbon dioxide reduction by mixed and pure cultures in microbial electrosynthesis using an assembly of graphite felt and stainless steel as a cathode

“…demonstrated microbial electrosynthesis by reducing CO 2 directly using electrons from the electrode at À0.6 V/ Ag/AgCl cathode potential (Nevin et al, 2011). Mixed microbial consortia from different sources have also been used in MES for CO 2 reduction to acetate Marshall et al, 2012;Su et al, 2013;Zaybak et al, 2013). In addition to the acetate, methane was also produced as a by-product when mixed culture inoculum was used without pre-enrichment Marshall et al, 2012).…”