Biohydrogen production in the suspended and attached microbial growth systems from waste pastry hydrolysate. (October 2016)

• Record Type: Journal Article
• Authors: Han, Wei; Hu, Yunyi; Li, Shiyi; Li, Feifei; Tang, Junhong
• Is Part Of: Bioresource technology. Volume 218(2016)
• Page Start: 589
• Page End: 594
• Publication Date: 2016-10
• Subjects: Continuous stirred tank reactor -- Continuous mixed immobilized sludge reactor -- Hydraulic retention time -- Biohydrogen production -- Waste pastry; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.07.009
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: This is the first study which reports biohydrogen production from waste pastry. Effects of HRT on hydrogen production in the CSTR and CMISR were compared. One gram pastry could be converted to 0.345 g glucose in the pastry hydrolysate. One gram waste pastry could produce 83.29 mL hydrogen in the CSTR. This study provides a novel way for biohydrogen production from organic solid wastes. 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) (4–12 h) 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 (201.8 mL/(h·L)) and CMISR (255.3 mL/(h·L)) were obtained at HRT of 6 h and 4 h, 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.