title: Elimination of methane in exhaust gas from biogas upgrading process by immobilized methane-oxidizing bacteria.
abstract: Biogas upgrading is essential for the comprehensive utilization of biogas as substitute of natural gas. However, the methane in the biogas can be fully recovered during the upgrading process of biogas, and the exhaust gas produced during biogas upgrading may contain a very low concentration of methane. If the exhaust gas with low concentration methane releases to atmosphere, it will be harmful to environment. In addition, the utilization of large amounts of digestate produced from biogas plant is another important issue for the development of biogas industry. In this study, solid digestate was used to produce active carbon, which was subsequently used as immobilized material for methane-oxidizing bacteria (MOB) in biofilter. Biofilter with MOB immobilized on active carbon was used to eliminate the methane in exhaust gas from biogas upgrading process. Results showed porous active carbon was successfully made from solid digestate. The final methane elimination capacity of immobilized MOB reached about 0.13molh-1m-3, which was more 4 times higher than that of MOB without immobilization.
authors.affiliation: State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong Province 266510, PR China; Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China.
authors.forename: Ya-Min
authors.initials: YM
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong Province 266510, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Yang
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China.
authors.forename: Xiao-Lei
authors.initials: XL
authors.lastname: Fan
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
authors.forename: Shan-Fei
authors.initials: SF
authors.lastname: Fu
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
authors.forename: Meng-Ting
authors.initials: MT
authors.lastname: Sun
authors.affiliation: Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China. Electronic address: guorb@qibebt.ac.cn.
authors.forename: Rong-Bo
authors.initials: RB
authors.lastname: Guo
mesh_terms: D056804:Biofuels; D008697:Methane; D008772:Methylococcaceae; D001335:Vehicle Emissions
chemical_list: D056804:Biofuels; D001335:Vehicle Emissions; D008697:Methane
keywords: Biofilter; Biogas digestate; Immobilization; Methane oxidation