title: Characteristics of a biofilm photobioreactor as applied to photo-hydrogen production.
abstract: The application of a cell immobilization technique to a biofilm-based photobioreactor was developed to enhance its photo-hydrogen production rate and light conversion efficiency. Rhodopseudomonas palustris CQK 01 was initially attached to the surface of packed glass beads to form a biofilm in this experiment. Then, the biofilm photobioreactor (BPBR) was illuminated by light-emitting diodes with light wavelengths of 470, 590 and 630 nm and hydrogen was evolved with glucose being the sole carbon source. Under the illumination condition of 5000 lux illumination intensity and 590 nm wavelength, the BPBR showed good hydrogen production performance: the hydrogen production rate was 38.9 ml/l/h and light conversion efficiency was 56%, while the hydrogen yield was 0.2 mol H(2)/ mol glucose. Furthermore, results show that the highest hydrogen production rate and glucose removal rate were obtained when the glucose concentration is 0.12 M, the optimal pH 7 and optimal temperature of influent liquid 25 degrees C.
authors.affiliation: Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Tian
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liao
authors.forename: Xun
authors.initials: X
authors.lastname: Zhu
authors.forename: Yongzhong
authors.initials: Y
authors.lastname: Wang
authors.forename: Pan
authors.initials: P
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Hong
authors.initials: H
authors.lastname: Wang
mesh_terms: D018441:Biofilms; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000737:chemistry; D005947:Glucose / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008027:Light; D008956:Models, Chemical; D010777:Photochemistry / Q000379:methods*; D010788:Photosynthesis; D012241:Rhodopseudomonas / Q000378:metabolism; D012722:Sewage; D013379:Substrate Specificity; D013696:Temperature
chemical_list: D012722:Sewage; D002244:Carbon; D006859:Hydrogen; D005947:Glucose