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- W3094168203 abstract "• First demonstration of microbial electrosynthesis from unpurified industrial CO 2. • Acetobacterium dominated mixed culture produced 1.8 g/L acetate at 0.26 g/L/d rate. • Clostridium ljungdahlii produced 1.14 g/L acetate at 0.138 ± 0.004 g/L/d rate. • Mixed culture outperformed the pure culture in bioproduction from industrial CO 2. • Microbial communities at cathode improved hydrogen electrocatalysis. The present study aimed to demonstrate the utilization of unpurified industrial CO 2 with low impurities for acetate production via microbial electrosynthesis (MES) for the first time. In MES experiments with CO 2 -rich brewery gas, the enriched mixed culture dominated by Acetobacterium produced 1.8 ± 0.2 g/L acetic acid at 0.26 ± 0.03 g/L catholyte /d rate and outperformed a pure culture of Clostridium ljungdahlii (1.1 ± 0.02 g/L; 0.138 ± 0.004 g/L catholyte /d). The electron recovery in acetic acid was also more for mixed culture (84 ± 13%) than C. ljungdahlii (42 ± 14%). Electrochemical analysis of biocathodes suggested the role of microbial biofilm in improved hydrogen electrocatalysis. In comparative gas fermentation tests, the mixed culture outperformed C. ljungdahlii and produced acetic acid at a similar level with both industrial and pure CO 2 feedstocks. These results suggest the robustness and capability of the mixed microbial community for utilizing slightly impure industrial CO 2 for bioproduction and presents a major advancement in MES technology." @default.
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- W3094168203 date "2021-01-01" @default.
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- W3094168203 title "Direct utilization of industrial carbon dioxide with low impurities for acetate production via microbial electrosynthesis" @default.
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- W3094168203 doi "https://doi.org/10.1016/j.biortech.2020.124289" @default.
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