title: Batch dark fermentation from enzymatic hydrolyzed food waste for hydrogen production.
abstract: A combination bioprocess of solid-state fermentation (SSF) and dark fermentative hydrogen production from food waste was developed. Aspergillus awamori and Aspergillus oryzae were utilized in SSF from food waste to generate glucoamylase and protease which were used to hydrolyze the food waste suspension to get the nutrients-rich (glucose and free amino nitrogen (FAN)) hydrolysate. Both glucose and FAN increased with increasing of food waste mass ratio from 4% to 10% (w/v) and the highest glucose (36.9 g/L) and FAN (361.3mg/L) were observed at food waste mass ratio of 10%. The food waste hydrolysates were then used as the feedstock for dark fermentative hydrogen production by heat pretreated sludge. The best hydrogen yield of 39.14 ml H2/g food waste (219.91 ml H2/VSadded) was achieved at food waste mass ratio of 4%. The proposed combination bioprocess could effectively accelerate the hydrolysis rate, improve raw material utilization and enhance hydrogen yield.
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Han
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
authors.forename: Min
authors.initials: M
authors.lastname: Ye
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
authors.forename: Ai Jun
authors.initials: AJ
authors.lastname: Zhu
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
authors.forename: Hong Ting
authors.initials: HT
authors.lastname: Zhao
authors.affiliation: School of Forestry, Northeast Forestry University, Harbin 150060, China. Electronic address: dr_lyf@nefu.edu.cn.
authors.forename: Yong Feng
authors.initials: YF
authors.lastname: Li
mesh_terms: D001230:Aspergillus / Q000378:metabolism; D019149:Bioreactors / Q000382:microbiology; D005285:Fermentation / Q000502:physiology*; D005502:Food; D005087:Glucan 1,4-alpha-Glucosidase / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D006859:Hydrogen / Q000378:metabolism*; D006868:Hydrolysis; D009584:Nitrogen / Q000378:metabolism; D010447:Peptide Hydrolases / Q000378:metabolism; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000382:microbiology
chemical_list: D012722:Sewage; D006859:Hydrogen; D005087:Glucan 1,4-alpha-Glucosidase; D010447:Peptide Hydrolases; D005947:Glucose; D009584:Nitrogen
keywords: Aspergillus awamori; Aspergillus oryzae; Food waste; Hydrogen production; Solid-state fermentation