title: Biomethane production and physicochemical characterization of anaerobically digested teff (Eragrostis tef) straw pretreated by sodium hydroxide.
abstract: The biogas production potential and biomethane content of teff straw through pretreatment by NaOH was investigated. Different NaOH concentrations (1%, 2%, 4% and 6%) were used for each four solid loadings (50, 65, 80 and 95 g/L). The effects of NaOH as pretreatment factor on the biodegradability of teff straw, changes in main compositions and enhancement of anaerobic digestion were analyzed. The result showed that, using 4% NaOH for pretreatment in 80 g/L solid loading produced 40.0% higher total biogas production and 48.1% higher biomethane content than the untreated sample of teff straw. Investigation of changes in chemical compositions and physical microstructure indicated that there was 4.3-22.1% total lignocellulosic compositions removal after three days pretreatment with NaOH. The results further revealed that NaOH pretreatment changed the structural compositions and lignin network, and improved biogas production from teff straw.
authors: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, No. 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China; College of Natural Science, Arba Minch University, Arba Minch, Ethiopia.
authors: Akiber
authors: A
authors: Chufo
authors: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, No. 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors: Hairong
authors: H
authors: Yuan
authors: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, No. 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors: Dexun
authors: D
authors: Zou
authors: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, No. 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors: Yunzhi
authors: Y
authors: Pang
authors: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, No. 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China. Electronic address: xjlibuct@gmail.com.
authors: Xiujin
authors: X
authors: Li
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D031750:Eragrostis / Q000187:drug effects / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D008031:Lignin / Q000737:chemistry; D008697:Methane / Q000096:biosynthesis*; D012722:Sewage; D012972:Sodium Hydroxide / Q000494:pharmacology*; D014835:Volatilization; D014866:Waste Products
chemical_list: D056804:Biofuels; D012722:Sewage; D014866:Waste Products; C036909:lignocellulose; D012972:Sodium Hydroxide; D008031:Lignin; D008697:Methane
keywords: Anaerobic digestion; Biodegradability; Biomethane; NaOH pretreatment; Teff straw