title: Enhancing methane production of corn stover through a novel way: sequent pretreatment of potassium hydroxide and steam explosion.
abstract: Getting over recalcitrance of lignocellulose is effective way to fuel production from lignocellulosic biomass. In current work, different pretreatments were applied to enhance the digestibility of corn stover (CS). Results showed that steam explosion (SE)-treated CS produced maximal methane yield (223.2 mL/gvs) at 1.2 MPa for 10 min, which was 55.2% more than untreated (143.8 mL/gvs). Whereas 1.5% KOH-treated CS produced maximum methane yield of 208.6 mL/gvs, and significantly (α<0.05) improved 45.1% with respect to untreated. Sequent pretreatment of potassium hydroxide and steam explosion (SPPE) (1.5% KOH-1.2 MPa, 10 min) achieved a very significant (α<0.01) improvement (80.0%) of methane yield (258.8 mL/gvs) compared with untreated CS. Methane production could be well explained by the first-order and modified Gompertz models. Besides, SEM, FTIR, and XRD analyses validated structural changes of CS after SPPE. SPPE might be a promising method to pretreat CS in the future AD industry.
authors: Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors: Jianghao
authors: J
authors: Li
authors: Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, United States.
authors: Ruihong
authors: R
authors: Zhang
authors: Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors: Muhammad Abdul Hanan
authors: MA
authors: Siddhu
authors: Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors: Yanfeng
authors: Y
authors: He
authors: Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors: Wen
authors: W
authors: Wang
authors: Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors: Yeqing
authors: Y
authors: Li
authors: College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address: chenchang@mail.buct.edu.cn.
authors: Chang
authors: C
authors: Chen
authors: Biomass Energy and Environmental Engineering Research Center, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors: Guangqing
authors: G
authors: Liu
mesh_terms: D000693:Anaerobiosis; D001709:Biotechnology / Q000379:methods*; D006878:Hydroxides / Q000494:pharmacology*; D008697:Methane / Q000096:biosynthesis*; D008962:Models, Theoretical; D017680:Potassium Compounds / Q000494:pharmacology*; D017550:Spectroscopy, Fourier Transform Infrared; D013227:Steam; D014866:Waste Products; D014961:X-Ray Diffraction; D003313:Zea mays / Q000737:chemistry* / Q000187:drug effects / Q000648:ultrastructure
chemical_list: D006878:Hydroxides; D017680:Potassium Compounds; D013227:Steam; D014866:Waste Products; D008697:Methane; C029943:potassium hydroxide
keywords: Corn stover; Methane production; Potassium hydroxide; Sequent pretreatment; Steam explosion