title: A multiphase mixture model for substrate concentration distribution characteristics and photo-hydrogen production performance of the entrapped-cell photobioreactor.
abstract: A multiphase mixture model was developed for revealing the interaction mechanism between biochemical reactions and transfer processes in the entrapped-cell photobioreactor packed with gel granules containing Rhodopseudomonas palustris CQK 01. The effects of difference operation parameters, including operation temperature, influent medium pH value and porosity of packed bed, on substrate concentration distribution characteristics and photo-hydrogen production performance were investigated. The results showed that the model predictions were in good agreement with the experimental data reported. Moreover, the operation temperature of 30 °C and the influent medium pH value of 7 were the most suitable conditions for photo-hydrogen production by biodegrading substrate. In addition, the lower porosity of packed bed was beneficial to enhance photo-hydrogen production performance owing to the improvement on the amount of substrate transferred into gel granules caused by the increased specific area for substrate transfer in the elemental volume.
authors.affiliation: School of Electric Power Engineering, China University of Mining and Technology, Xuzhou 221116, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China. Electronic address: clguo@cumt.edu.cn.
authors.forename: Cheng-Long
authors.initials: CL
authors.lastname: Guo
authors.affiliation: Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou 221008, China.
authors.forename: Hong-Xia
authors.initials: HX
authors.lastname: Cao
authors.affiliation: School of Electric Power Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Hong-Shan
authors.initials: HS
authors.lastname: Pei
authors.affiliation: School of Electric Power Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Fei-Qiang
authors.initials: FQ
authors.lastname: Guo
authors.affiliation: Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China; Guizhou Electric Power Test and Research Institute, Guiyang 550002, China.
authors.forename: Da-Meng
authors.initials: DM
authors.lastname: Liu
mesh_terms: D001709:Biotechnology / Q000295:instrumentation* / Q000379:methods*; D006859:Hydrogen / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D008027:Light; D008962:Models, Theoretical; D058433:Photobioreactors / Q000382:microbiology; D016062:Porosity; D012241:Rhodopseudomonas / Q000378:metabolism; D013696:Temperature; D014865:Waste Disposal, Fluid
chemical_list: D006859:Hydrogen
keywords: Entrapped-cell photobioreactor; Mass transfer; Multiphase mixture model; Photo-hydrogen production; Substrate concentration distribution