title: Biohydrogen production in the suspended and attached microbial growth systems from waste pastry hydrolysate.
abstract: Waste pastry was hydrolyzed by glucoamylase and protease which were obtained from solid state fermentation of Aspergillus awamori and Aspergillus oryzae to produce waste pastry hydrolysate. Then, the effects of hydraulic retention times (HRTs) (4-12h) on hydrogen production rate (HPR) in the suspended microbial growth system (continuous stirred tank reactor, CSTR) and attached microbial growth system (continuous mixed immobilized sludge reactor, CMISR) from waste pastry hydrolysate were investigated. The maximum HPRs of CSTR (201.8mL/(h·L)) and CMISR (255.3mL/(h·L)) were obtained at HRT of 6h and 4h, respectively. The first-order reaction could be used to describe the enzymatic hydrolysis of waste pastry. The carbon content of the waste pastry remained 22.8% in the undigested waste pastry and consumed 77.2% for carbon dioxide and soluble microbial products. To our knowledge, this is the first study which reports biohydrogen production from waste pastry.
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: Yunyi
authors.initials: Y
authors.lastname: Hu
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
authors.forename: Shiyi
authors.initials: S
authors.lastname: Li
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
authors.forename: Feifei
authors.initials: F
authors.lastname: Li
authors.affiliation: College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China. Electronic address: dr_tjh@163.com.
authors.forename: Junhong
authors.initials: J
authors.lastname: Tang
mesh_terms: D001230:Aspergillus / Q000254:growth & development / Q000378:metabolism; D001419:Bacteria / Q000254:growth & development* / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D002244:Carbon / Q000378:metabolism; D005285:Fermentation; D005087:Glucan 1,4-alpha-Glucosidase / Q000378:metabolism; D006859:Hydrogen / Q000378:metabolism*; D006868:Hydrolysis; D012722:Sewage / Q000737:chemistry / Q000382:microbiology; D014908:Triticum / Q000737:chemistry / Q000378:metabolism; D014866:Waste Products
chemical_list: D012722:Sewage; D014866:Waste Products; D002244:Carbon; D006859:Hydrogen; D005087:Glucan 1,4-alpha-Glucosidase
keywords: Biohydrogen production; Continuous mixed immobilized sludge reactor; Continuous stirred tank reactor; Hydraulic retention time; Waste pastry