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KMID : 1094720080130040499
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Biotechnology and Bioprocess Engineering
2008 Volume.13 No. 4 p.499 ~ p.504
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Hydrogen production conditions from food waste by dark fermentation with Clostridium beijerinckii KCTC 1785
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Kim Jung-Kon
Nhat Le
Chun Young-Nam
Kim Si-Wouk
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Abstract
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The optimum conditions for biological hydrogen production from food waste by Clostridium beijerinckii KCTC 1875 were investigated. The optimum initial pH and fermentation temperature were 7.0 and 40°C, respectively. When the pH of fermentation was controlled to 5.5, a maximum amount of hydrogen could be obtained. Under these conditions, about 2,737 mL of hydrogen was produced from 50 g COD/L of food waste for 24 h, and the hydrogen content in the biogas was 38%. Hydrogen production rate and yield were about 108 mL/L·h and 128 mL/g CODdegraded, respectively. High concentrations of acetic (< 5,000 mg/L) or butyric acid (< 3,000 mg/L) significantly inhibited hydrogen production.
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KEYWORD
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biohydrogen, dark fermentation, food waste, Clostridium beijerinckii, bioenergy
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