title: Kinetic study of pH effects on biological hydrogen production by a mixed culture.
abstract: The effect of pH on anaerobic hydrogen production was investigated under various pH conditions ranging from pH 3 to 10. When the modified Gompertz equation was applied to the statistical analysis of the experimental data, the hydrogen production potential and specific hydrogen production rate at pH 5 were 1,182 ml and 112.5 ml/g biomass-h, respectively. In this experiment, the maximum theoretical hydrogen conversion ratio was 22.56%. The Haldane equation model was used to find the optimum pH for hydrogen production and the maximum specific hydrogen production rate. The optimum pH predicted by this model is 5.5 and the maximum specific hydrogen production rate is 119.6 ml/g VSS-h. These data fit well with the experimental data (r2=0.98).
authors.affiliation: Department of Environmental Engineering, Seoul National University of Technology, Seoul 139-743, Korea.
authors.forename: Yoon-Sun
authors.initials: YS
authors.lastname: Jun
authors.forename: Seung-Ho
authors.initials: SH
authors.lastname: Yu
authors.forename: Keun-Garp
authors.initials: KG
authors.lastname: Ryu
authors.forename: Tae-Jin
authors.initials: TJ
authors.lastname: Lee
mesh_terms: D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism*; D018533:Biomass; D019149:Bioreactors; D005232:Fatty Acids, Volatile / Q000378:metabolism; D005285:Fermentation; D006859:Hydrogen / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007218:Industrial Microbiology; D007700:Kinetics; D008954:Models, Biological; D012722:Sewage; D013395:Sucrose / Q000378:metabolism
chemical_list: D005232:Fatty Acids, Volatile; D012722:Sewage; D013395:Sucrose; D006859:Hydrogen