Na, B.K. Tae, S.H. Sung, H.L. Ju, Donghun Sang, Byung In Doo, H.P. 2024-01-21T01:31:53Z 2024-01-21T01:31:53Z 2021-09-02 2007-03 1598-642X https://pubs.kist.re.kr/handle/201004/134621 A gas-circulating bioreactor was used for enrichment of autotrophic methanogens. Mixture of hydrogen and carbon dioxide (5:1) was used as a sole energy and carbon source. Anaerobic digestive sludge isolated from wastewater treatment system was inoculated into the gas-circulating bioreactor. The enrichment of two chemolithotrophic methanogens, Methanobacterium curvum and Methanobacterium oryzae was accomplished in the gas-circulating bioreactor. The enriched bacteria were cultivated in a bioreactor equipped with hollow-fiber hydrogen-supplying system (hollow-fiber bioreactor), and a hybrid-type bioreactor equipped with hollow-fiber hydrogen-supplying system and electrochemical redox control system. The methane productivity was maximally 30% (V/V) in the hollow-fiber bioreactors and 50% (V/V) in the hybrid-type bioreactor. Korean carbon dioxide hydrogen methane article autotrophy bioreactor chemolithotroph electrochemistry energy resource hollow fiber inoculation Methanobacterium methanogen nonhuman oxidation reduction reaction sludge digestion waste water management Methanobacterium curvum Methanobacterium oryzae Development of bioreactors for enrichment of chemolithotrophic methanogen and methane production Article 1 Korean Journal of Microbiology and Biotechnology, v.35, no.1, pp.52 - 57 Korean Journal of Microbiology and Biotechnology 35 1 52 57 scopus 2-s2.0-34147159606 Article carbon dioxide hydrogen methane article autotrophy bioreactor chemolithotroph electrochemistry energy resource hollow fiber inoculation Methanobacterium methanogen nonhuman oxidation reduction reaction sludge digestion waste water management Methanobacterium curvum Methanobacterium oryzae Chemolithotrophic methanogen Electrochemical bioreactor Hollow-fiber Methanobacterium curvum Methanobacterium oryzae