title: Promoting anaerobic biogasification of corn stover through biological pretreatment by liquid fraction of digestate (LFD).
abstract: A new biological pretreatment method by using liquid fraction of digestate (LFD) was advanced for promoting anaerobic biogasification efficiency of corn stover. 17.6% TS content and ambient temperature was appropriate for pretreatment. The results showed that C/N ratio decreased to about 30, while total lignin, cellulose, and hemicellulose (LCH) contents were reduced by 8.1-19.4% after pretreatment. 3-days pretreatment was considered to be optimal, resulting in 70.4% more biogas production, 66.3% more biomethane yield and 41.7% shorter technical digestion time compared with the untreated stover. The reductions on VS, cellulose, and hemicellulose were increased by 22.1-35.9%, 22.3-35.4%, and 19.8-27.2% for LFD-treated stovers. The promoted anaerobic biogasification efficiency was mainly attributed to the improved biodegradability due to the pre-decomposition role of the bacteria in LFD. The method proved to be an efficient and low cost approach for producing bioenergy from corn stover, meanwhile, reducing LFD discharge and minimizing its potential pollution.
authors.affiliation: Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Hu
authors.affiliation: Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Yunzhi
authors.initials: Y
authors.lastname: Pang
authors.affiliation: Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Hairong
authors.initials: H
authors.lastname: Yuan
authors.affiliation: Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Dexun
authors.initials: D
authors.lastname: Zou
authors.affiliation: Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Yanping
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Baoning
authors.initials: B
authors.lastname: Zhu
authors.affiliation: Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Wachemo Akiber
authors.initials: WA
authors.lastname: Chufo
authors.affiliation: Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Jaffar
authors.affiliation: Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China. Electronic address: xjli@mail.buct.edu.cn.
authors.forename: Xiujin
authors.initials: X
authors.lastname: Li
mesh_terms: D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000378:metabolism; D002482:Cellulose / Q000378:metabolism; D008031:Lignin / Q000378:metabolism; D008697:Methane / Q000096:biosynthesis*; D009584:Nitrogen / Q000378:metabolism; D018520:Plant Shoots / Q000737:chemistry / Q000378:metabolism; D011134:Polysaccharides / Q000378:metabolism; D003313:Zea mays / Q000737:chemistry* / Q000378:metabolism* / Q000382:microbiology
chemical_list: D056804:Biofuels; D011134:Polysaccharides; D002244:Carbon; C007916:hemicellulose; D002482:Cellulose; D008031:Lignin; D009584:Nitrogen; D008697:Methane
keywords: Anaerobic biogasification; Biological pretreatment; Corn stover; Liquid fraction of digestate (LFD)