title: The thermophilic (55°C) microaerobic pretreatment of corn straw for anaerobic digestion.
abstract: Microaerobic process has been proven to be an alternative pretreatment for the anaerobic digestion (AD) process in several studies. In this study, the effect of thermophilic microaerobic pretreatment (TMP) on the AD of corn straw was investigated. Results indicated that TMP process obviously improved the methane yield. The maximum methane yield was obtained at the oxygen loads of 5ml/g VSsubstrate, which was 16.24% higher than that of untreated group. The modified first order equation analysis showed the TMP process not only accelerated the hydrolysis rates but also reduced the lag-phase time of AD process. The structural characterization analysis showed cellulosic structures of corn straw were partly disrupted during TMP process. The crystallinity indexes were also decreased. In addition, large or destroyed pores and substantial structural disruption were observed after pretreatment. The results showed that TMP is an efficient pretreatment method for the AD of corn straw.
authors.affiliation: 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: 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: Fei
authors.initials: F
authors.lastname: Wang
authors.affiliation: Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China.
authors.forename: Xian-Zheng
authors.initials: XZ
authors.lastname: Yuan
authors.affiliation: Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China.
authors.forename: Zhi-Man
authors.initials: ZM
authors.lastname: Yang
authors.affiliation: Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China.
authors.forename: Sheng-Jun
authors.initials: SJ
authors.lastname: Luo
authors.affiliation: 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: 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: D000693:Anaerobiosis; D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D005285:Fermentation; D006868:Hydrolysis; D008697:Methane / Q000096:biosynthesis*; D059013:Microbial Consortia; D008855:Microscopy, Electron, Scanning; D010100:Oxygen / Q000378:metabolism; D018520:Plant Shoots / Q000737:chemistry / Q000378:metabolism; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction; D003313:Zea mays / Q000737:chemistry / Q000378:metabolism*
chemical_list: D056804:Biofuels; D008697:Methane; D010100:Oxygen
keywords: Anaerobic digestion; Corn straw; Structural characterization analysis; Thermophilic microaerobic pretreatment