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KMID : 0545120080180061130
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Journal of Microbiology and Biotechnology
2008 Volume.18 No. 6 p.1130 ~ p.1135
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Kinetic Study of pH Effects on Biological Hydrogen Production by a Mixed Culture
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Jun Yoon-Sun
Lee Tae-Jin
Yu Seung-Ho
Ryu Keun-Garp
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Abstract
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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).
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KEYWORD
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Hydrogen production, kinetics, mixed culture, pH effects
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