title: Preliminary trial on degradation of waste activated sludge and simultaneous hydrogen production in a newly-developed solar photocatalytic reactor with AgX/TiO2-coated glass tubes.
abstract: A solar fluidized tubular photocatalytic reactor (SFTPR) with simple and efficient light collector was developed to degrade waste activated sludge (WAS) and simultaneously produce hydrogen. The photocatalyst was a TiO2 film doped by silver and silver compounds (AgX). The synthesized photocatalyst, AgX/TiO2, exhibited higher photocatalytic activity than TiO2 (99.5% and 30.6% of methyl orange removal, respectively). The installation of light collector could increase light intensity by 26%. For WAS treatment using the SFTPR, 69.1% of chemical oxygen demand (COD) removal and 7866.7 μmol H2/l-sludge of hydrogen production were achieved after solar photocatalysis for 72 h. The SFTPR could be a promising photocatalysis reactor to effectively degrade WAS with simultaneous hydrogen production. The results can also provide a useful base and reference for the application of photocatalysis on WAS degradation in practice.
authors.affiliation: Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
authors.forename: Chunguang
authors.initials: C
authors.lastname: Liu
authors.forename: Zhongfang
authors.initials: Z
authors.lastname: Lei
authors.forename: Yingnan
authors.initials: Y
authors.lastname: Yang
authors.forename: Zhenya
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D001391:Azo Compounds / Q000737:chemistry / Q000378:metabolism; D057919:Biological Oxygen Demand Analysis; D002384:Catalysis; D004867:Equipment Design; D006859:Hydrogen / Q000378:metabolism*; D010777:Photochemistry / Q000295:instrumentation* / Q000379:methods*; D012722:Sewage; D018030:Silver Compounds / Q000737:chemistry; D012993:Solar Energy; D014025:Titanium / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D001391:Azo Compounds; D012722:Sewage; D018030:Silver Compounds; C009495:titanium dioxide; C100258:methyl orange; D006859:Hydrogen; D014025:Titanium
keywords: Ag doping; Hydrogen production; Solar fluidized tubular photocatalytic reactor (SFTPR); TiO(2) photocatalysis; Waste activated sludge