title: Electropolar effects on anaerobic fermentation of lignocellulosic materials in novel single-electrode cells.
abstract: As a promising renewable energy technology, anaerobic fermentation is consistently limited by low production and calorific value of biogas, along with the difficulty of lignocellulose degradation. The effects of polarity and micro-voltage on anaerobic fermentation from lignocellulosic materials were investigated in single-electrode fermenter to explore cost-efficient technology. The results illustrated that the biogas production and quality were significantly affected by electric polarity. And cathode-assisted fermentation led to more positive effects than anode-assisted. Compared with results in control group without electrode, the average biogas and methane yield under cathodic micro-voltage (-250 mV) were astonishingly improved by 2.82 and 2.44 mL g(-1)d(-1) respectively. Meanwhile, the degradation ratios of lignin and cellulose were also improved by 23.11% and 19.46%. It demonstrated that single micro-voltage can not only promote lignocellulose degradation but biogas production and calorific value. These micro-voltage effects on fermentation process also provided great opportunity to breakthrough the present limitation of lignocellulosic materials fermentation.
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, Yunnan 650500, China.
authors.forename: Guangfei
authors.initials: G
authors.lastname: Qu
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, Yunnan 650500, China.
authors.forename: Weixia
authors.initials: W
authors.lastname: Qiu
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, Yunnan 650500, China.
authors.forename: Yuhuan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, Yunnan 650500, China.
authors.forename: Dongwei
authors.initials: D
authors.lastname: Zhong
authors.affiliation: Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, Yunnan 650500, China. Electronic address: qgfljy@126.com.
authors.forename: Ping
authors.initials: P
authors.lastname: Ning
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D001674:Bioelectric Energy Sources; D056804:Biofuels / Q000032:analysis; D019149:Bioreactors / Q000382:microbiology; D002417:Cattle; D004560:Electricity; D004566:Electrodes; D005285:Fermentation; D008031:Lignin / Q000378:metabolism*; D008372:Manure / Q000032:analysis; D008697:Methane; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors; D014961:X-Ray Diffraction
chemical_list: D056804:Biofuels; D008372:Manure; C036909:lignocellulose; D008031:Lignin; D008697:Methane
keywords: Anaerobic fermentation; Lignocellulose; Methane; Micro-voltage; Single-electrode