title: A kinetic approach to anaerobic hydrogen-producing process.
abstract: Kinetics of hydrogen production from sucrose by mixed anaerobic cultures was investigated, and the Gompertz model was modified to describe the growth of hydrogen-producing microorganisms, consumption of substrate and formation of product in this work. A modified Gompertz model could adequately fit the experimental results. The effects of pH, temperature and the ratio of the initial substrate concentration to initial biomass concentration (S(0)/X(0)) on the maximum specific microbial growth rate (micro(m)) were evaluated using a response-surface methodology. Experimental results show that pH, temperature and S(0)/X(0) all had an influence on micro(m). The effect of pH and the second-order effect of pH and temperature were significant. A maximum micro(m) of 0.078 h(-1) was estimated under the optimum conditions of pH 5.5, temperature 34.6 degrees C and S(0)/X(0) of 4.3g/g-VSS. Modeling of microbial growth, substrate consumption and product formation was useful for optimizing the anaerobic hydrogen-producing process.
authors.affiliation: Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Mu
authors.forename: Han-Qing
authors.initials: HQ
authors.lastname: Yu
authors.forename: Gang
authors.initials: G
authors.lastname: Wang
mesh_terms: D000693:Anaerobiosis; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D018533:Biomass; D019149:Bioreactors; D005285:Fermentation; D006859:Hydrogen / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D012722:Sewage / Q000382:microbiology; D013696:Temperature; D013997:Time Factors
chemical_list: D012722:Sewage; D006859:Hydrogen