title: Bioaugmentation with an acetate-type fermentation bacterium Acetobacteroides hydrogenigenes improves methane production from corn straw.
abstract: The effect of bioaugmentation with an acetate-type fermentation bacterium in the phylum Bacteroidetes on the anaerobic digestion of corn straw was evaluated by batch experiments. Acetobacteroides hydrogenigenes is a promising strain for bioaugmentation with relatively high growth rate, hydrogen yields and acetate tolerance, which ferments a broad spectrum of pentoses, hexoses and polyoses mainly into acetate and hydrogen. During corn straw digestion, bioaugmentation with A. hydrogenigenes led to 19-23% increase of the methane yield, with maximum of 258.1 mL/g-corn straw achieved by 10% inoculation (control, 209.3 mL/g-corn straw). Analysis of lignocellulosic composition indicated that A. hydrogenigenes could increase removal rates of cellulose and hemicelluloses in corn straw residue by 12% and 5%, respectively. Further experiment verified that the addition of A. hydrogenigenes could improve the methane yields of methyl cellulose and xylan (models for cellulose and hemicelluloses, respectively) by 16.8% and 7.0%.
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production and Utilization, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production and Utilization, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, PR China.
authors.forename: Rong-Bo
authors.initials: RB
authors.lastname: Guo
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production and Utilization, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, PR China. Electronic address: qiuyl@qibebt.ac.cn.
authors.forename: Yan-Ling
authors.initials: YL
authors.lastname: Qiu
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production and Utilization, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, PR China.
authors.forename: Jiang-Tao
authors.initials: JT
authors.lastname: Qiao
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production and Utilization, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, PR China.
authors.forename: Xian-Zheng
authors.initials: XZ
authors.lastname: Yuan
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production and Utilization, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, PR China.
authors.forename: Xiao-Shuang
authors.initials: XS
authors.lastname: Shi
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production and Utilization, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, PR China.
authors.forename: Chuan-Shui
authors.initials: CS
authors.lastname: Wang
mesh_terms: D000085:Acetates / Q000378:metabolism*; D000693:Anaerobiosis; D041963:Bacteroidetes / Q000254:growth & development / Q000378:metabolism*; D001673:Biodegradation, Environmental; D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D002482:Cellulose / Q000378:metabolism; D018920:Coculture Techniques; D005285:Fermentation; D005947:Glucose / Q000378:metabolism; D006859:Hydrogen / Q000378:metabolism; D008031:Lignin / Q000378:metabolism; D008697:Methane / Q000096:biosynthesis*; D010313:Partial Pressure; D014866:Waste Products; D014990:Xylans / Q000378:metabolism; D003313:Zea mays / Q000737:chemistry*
chemical_list: D000085:Acetates; D056804:Biofuels; D014866:Waste Products; D014990:Xylans; D006859:Hydrogen; D002482:Cellulose; D008031:Lignin; D005947:Glucose; D008697:Methane
keywords: Acetobacteroides hydrogenigenes; Anaerobic digestion; Bioaugmentation; Corn straw; Methane