title: Effect of lipase addition on hydrolysis and biomethane production of Chinese food waste.
abstract: The lipase obtained from Aspergillums niger was applied to promote the hydrolysis of food waste for achieving high biomethane production. Two strategies of lipase additions were investigated. One (Group A) was to pre-treat food waste to pre-decompose lipid to fatty acids before anaerobic digestion, and another one (Group B) was to add lipase to anaerobic digester directly to degrade lipid inside digester. The lipase was used at the concentrations of 0.1%, 0.5%, and 1.0% (w/v). The results showed that Group A achieved higher biomethane production, TS and VS reductions than those of Group B. At 0.5% lipase concentration, Group A obtained experimental biomethane yield of 500.1 mL/g VS(added), 4.97-26.50% higher than that of Group B. The maximum Bd of 73.8% was also achieved in Group A. Therefore, lipase pre-treatment strategy is recommended. This might provide one of alternatives for efficient biomethane production from food waste and mitigating environmental impact associated.
authors.affiliation: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Meng
authors.affiliation: College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Puzhu Nanlu 30, Jiangpu District, Nanjing 211816, PR China.
authors.forename: Sang
authors.initials: S
authors.lastname: Li
authors.affiliation: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors.forename: Hairong
authors.initials: H
authors.lastname: Yuan
authors.affiliation: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors.forename: Dexun
authors.initials: D
authors.lastname: Zou
authors.affiliation: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors.forename: Yanping
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
authors.forename: Baoning
authors.initials: B
authors.lastname: Zhu
authors.affiliation: Centre for Resource and Environmental Research, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China. Electronic address: xjlibuct@gmail.com.
authors.forename: Xiujin
authors.initials: X
authors.lastname: Li
mesh_terms: D000693:Anaerobiosis / Q000187:drug effects; D000818:Animals; D001234:Aspergillus niger / Q000201:enzymology; D001673:Biodegradation, Environmental / Q000187:drug effects; D002681:China; D005232:Fatty Acids, Volatile / Q000032:analysis; D005502:Food; D006868:Hydrolysis / Q000187:drug effects; D008049:Lipase / Q000494:pharmacology*; D008697:Methane / Q000096:biosynthesis*; D008962:Models, Theoretical; D034421:Sus scrofa; D014835:Volatilization / Q000187:drug effects; D014866:Waste Products
chemical_list: D005232:Fatty Acids, Volatile; D014866:Waste Products; D008049:Lipase; D008697:Methane
keywords: Anaerobic digestion; Biomethane; Food waste; Hydrolysis; Lipase addition