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Improvement of Biohydrogen Production Under Decreased Partial Pressure of H2 by Enterobacter cloacae

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When the partial pressure of H2 was decreased by lowering the total pressure in the headspace of the reactor in a batch fermentation process from 760 mm Hg to 380 mm Hg containing Enterobacter cloacae, the molar yield of H2 increased from 1.9 mol to 3.9 mol H2/mol glucose. The maximum production rate was 0.017 mmol H2/h l at 380 mm Hg. The lag period as well as total batch time of H2 production decreased using a decreased partial pressure.

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Financial assistance received from the Department of Biotechnology, Ministry of Non-Conventional Energy Source, Ministry of Science and Technology, Government of India is thankfully acknowledged.

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Correspondence to Debabrata Das.

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Mandal, B., Nath, K. & Das, D. Improvement of Biohydrogen Production Under Decreased Partial Pressure of H2 by Enterobacter cloacae . Biotechnol Lett 28, 831–835 (2006).

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