title: Secondary thermophilic microaerobic treatment in the anaerobic digestion of corn straw.
abstract: Thermophilic microaerobic pretreatment (TMP) has been proved to be an alternative pretreatment method during anaerobic digestion (AD) of corn straw. In this study, in order to improve the fermentation efficiency during late AD stage, improve the methane yield and volatile solid (VS) removal efficiency, a secondary thermophilic microaerobic treatment (STMT) was applied in the late AD stage of corn straw. Results showed STMT obviously improved the fermentation efficiency, methane yield and VS removal efficiency. The maximum methane yield and maximum VS removal efficiency were simultaneously obtained when the oxygen loads during STMT was 10 ml/g VS (VS of residual substrate). The maximum methane yield was 380.6 ml/g VS(substrate), which was 28.45% and 10.61% higher than those of untreated and once thermophilic microaerobic pretreated samples, respectively. The maximum VS removal efficiency was 81.85%, which was 29.43% and 17.23% higher than those of untreated and once thermophilic microaerobic pretreated samples, respectively.
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.
authors.forename: Xiao-Shuang
authors.initials: XS
authors.lastname: Shi
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-Hui
authors.initials: XH
authors.lastname: Xu
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: Chuan-Shui
authors.initials: CS
authors.lastname: Wang
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: Lin
authors.initials: L
authors.lastname: Wang
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: Meng
authors.initials: M
authors.lastname: Dai
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: D001420:Bacteria, Aerobic / Q000378:metabolism; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D056804:Biofuels; D001709:Biotechnology / Q000379:methods* / Q000706:statistics & numerical data; D005285:Fermentation; D008697:Methane / Q000096:biosynthesis*; D018547:Plant Stems / Q000378:metabolism*; D003313:Zea mays / Q000378:metabolism*
chemical_list: D056804:Biofuels; D008697:Methane
keywords: Anaerobic digestion; Methane yield; Secondary thermophilic microaerobic treatment; VS removal efficiency