title: The effect of temperature and effluent recycle rate on hydrogen production by undefined bacterial granules.
abstract: Biohydrogen production in an anaerobic fluidized granular bed bioreactor was strongly dependent on temperature and effluent recycle rates. At 45 °C as the effluent recycle rate was increased from 1.3 to 3.5 L/min, the total H₂ output for the bioreactor increased from 10.6 to 43.2 L/h. Volumetric H(2) productivity also increased from 2.1 to 8.7 L H₂/L/h. At 70°C as the effluent recycle was increased from 1.3 to 3.5 L/min, the total H₂ output for the bioreactor increased from 13.8 to 73.8L/h. At 70 °C volumetric H(2) productivities increased from 2.8 to 14.8L H₂/L/h as the effluent recycle rate was increased from 1.3 to 3.5 L/min. At 45 °C % H₂ was 45% and reached 67% at 70 °C. Maximum hydrogen yields at 45 °C were 1.24 and 2.2 mol H₂/mol glucose at 70 °C.
authors.affiliation: School of Molecular and Cell Biology, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa.
authors.forename: L
authors.initials: L
authors.lastname: Ngoma
authors.forename: P
authors.initials: P
authors.lastname: Masilela
authors.forename: F
authors.initials: F
authors.lastname: Obazu
authors.forename: V M
authors.initials: VM
authors.lastname: Gray
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism*; D056804:Biofuels; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D006859:Hydrogen / Q000378:metabolism*; D013696:Temperature
chemical_list: D056804:Biofuels; D006859:Hydrogen