کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9604434 43625 2005 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Continuous hydrogen production by the hyperthermophilic archaeon, Thermococcus kodakaraensis KOD1
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Continuous hydrogen production by the hyperthermophilic archaeon, Thermococcus kodakaraensis KOD1
چکیده انگلیسی
The hydrogen (H2) production potential of the hyperthermophilic archaeon, Thermococcus kodakaraensis KOD1 was evaluated at 85 °C. In batch cultivation using a complex medium supplemented with elemental sulfur (S0), evolution of H2S and CO2 was observed in the gas phase. When S0 was omitted and pyruvate or starch was added in the medium, the cells produced H2 at high levels instead of H2S. As the level of H2 appeared to correlate with the specific growth rate, analysis in continuous cultures was performed to develop a continuous H2 production system. In a steady-state condition at a dilution rate of 0.2 h−1, a continuous H2 production rate (per gram dry weight, gdw) of 24.9 and 14.0 mmol gdw−1 h−1 was observed in media supplemented with pyruvate and starch, respectively. In both cultivations, a high accumulation of acetate and alanine was found as metabolites. When the dilution rates were elevated in the medium with pyruvate, steady-state growth was observed up to 0.8 h−1, and a maximum H2 production rate of 59.6 mmol gdw−1 h−1 was obtained. Based on the experimental results along with data of the entire genome sequence, the metabolic pathway of the strain relating to starch and pyruvate degradation is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biotechnology - Volume 116, Issue 3, 30 March 2005, Pages 271-282
نویسندگان
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