title: Biological hydrogen production by immobilized cells of Clostridium tyrobutyricum JM1 isolated from a food waste treatment process.
abstract: A fermentative hydrogen-producing bacterium, Clostridium tyrobutyricum JM1, was isolated from a food waste treating process using 16S rRNA gene sequencing and amplified ribosomal DNA restriction analysis (ARDRA). A fixed-bed bioreactor packed with polyurethane foam as support matrix for the growth of the isolate was operated at different hydraulic retention time (HRT) to evaluate its performance for hydrogen production. The reactor achieved the maximal hydrogen production rate of 7.2 l H(2)l(-1)d(-1) at 2h HRT, where hydrogen content in biogas was 50.0%, and substrate conversion efficiency was 97.4%. The maximum hydrogen yield was 223 ml (g-hexose)(-1) with an influent glucose concentration of 5 g l(-1). Therefore, the immobilized reactor using C. tyrobutyricum JM1 was an effective and stable system for continuous hydrogen production.
authors.affiliation: Advanced Environmental Biotechnology Research Center, School of Environmental Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang, Gyeongbuk 790-784, South Korea.
authors.forename: Ji Hye
authors.initials: JH
authors.lastname: Jo
authors.forename: Dae Sung
authors.initials: DS
authors.lastname: Lee
authors.forename: Donghee
authors.initials: D
authors.lastname: Park
authors.forename: Jong Moon
authors.initials: JM
authors.lastname: Park
mesh_terms: D019149:Bioreactors; D048014:Clostridium tyrobutyricum / Q000235:genetics / Q000378:metabolism*; D004275:DNA, Ribosomal / Q000235:genetics; D005285:Fermentation; D019649:Food Industry; D006859:Hydrogen / Q000378:metabolism*; D007220:Industrial Waste; D012336:RNA, Ribosomal, 16S / Q000235:genetics
chemical_list: D004275:DNA, Ribosomal; D007220:Industrial Waste; D012336:RNA, Ribosomal, 16S; D006859:Hydrogen