title: Improving Biomethane Production and Mass Bioconversion of Corn Stover Anaerobic Digestion by Adding NaOH Pretreatment and Trace Elements.
abstract: This research applied sodium hydroxide (NaOH) pretreatment and trace elements to improve biomethane production when using corn stover for anaerobic digestion. Full-factor experimental tests identified the best combination of trace elements with the NaOH pretreatment, indicating that the best combination was with 1.0, 0.4, and 0.4 mg·L(-1)·d(-1) of elements Fe, Co, and Ni, respectively. The cumulative biomethane production adding NaOH pretreatment and trace elements was 11,367 mL; total solid bioconversion rate was 55.7%, which was 41.8%-62.2% higher than with NaOH-pretreatment alone and 22.2%-56.3% higher than with untreated corn stover. The best combination was obtained 5-9 days shorter than T90 and maintained good system operation stability. Only a fraction of the trace elements in the best combination was present in the resulting solution; more than 85% of the total amounts added were transferred into the solid fraction. Adding 0.897 g of Fe, 0.389 g of Co, and 0.349 g of Ni satisfied anaerobic digestion needs and enhanced biological activity at the beginning of the operation. The results showed that NaOH pretreatment and adding trace elements improve corn stover biodegradability and enhance biomethane production.
authors.affiliation: College of Chemical Technology, Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, China.
authors.forename: ChunMei
authors.initials: C
authors.lastname: Liu
authors.affiliation: College of Chemical Technology, Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, China.
authors.forename: HaiRong
authors.initials: H
authors.lastname: Yuan
authors.affiliation: College of Chemical Technology, Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, China.
authors.forename: DeXun
authors.initials: D
authors.lastname: Zou
authors.affiliation: College of Chemical Technology, Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, China.
authors.forename: YanPing
authors.initials: Y
authors.lastname: Liu
authors.affiliation: College of Chemical Technology, Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, China.
authors.forename: BaoNing
authors.initials: B
authors.lastname: Zhu
authors.affiliation: College of Chemical Technology, Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, China.
authors.forename: XiuJin
authors.initials: X
authors.lastname: Li
mesh_terms: D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D056804:Biofuels; D001709:Biotechnology; D008031:Lignin / Q000737:chemistry; D008697:Methane / Q000096:biosynthesis* / Q000737:chemistry; D012972:Sodium Hydroxide / Q000737:chemistry; D014131:Trace Elements / Q000737:chemistry; D014866:Waste Products; D003313:Zea mays / Q000737:chemistry*
chemical_list: D056804:Biofuels; D014131:Trace Elements; D014866:Waste Products; D012972:Sodium Hydroxide; D008031:Lignin; D008697:Methane