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      Continuous hydrogen and butyric acid fermentation by immobilized Clostridium tyrobutyricum ATCC 25755: Effects of the glucose concentration and hydraulic retention time

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      Bioresource Technology

      Elsevier BV

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          Abstract

          The effects of the hydraulic retention time (HRT=8, 10, 12 or 16.7 h) and glucose concentration (30, 40 or 50 g/L) on the production of hydrogen and butyrate by an immobilized Clostridium tyrobutyricum culture, grown under continuous culturing conditions, were evaluated. With 30 g/L glucose, the higher HRTs tested led to greater butyrate concentrations in the culture, i.e., 9.3 g/L versus 12.9 g/L with HRTs of 8 h and 16.7 h, respectively. In contrast, higher biogas and hydrogen production rates were generally seen when the HRT was lower. Experiments with different glucose concentrations saw a significant amount of glucose washed out when 50 g/L was used, the highest being 22.7 g/L when the HRT was 16.7 h. This study found the best conditions for the continuous production of hydrogen and butyric acid by C. tyrobutyricum to be with an HRT of 12 h and a glucose concentration of 50 g/L, respectively.

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          Author and article information

          Journal
          Bioresource Technology
          Bioresource Technology
          Elsevier BV
          09608524
          November 2009
          November 2009
          : 100
          : 21
          : 5352-5355
          10.1016/j.biortech.2009.05.046
          19545998
          © 2009

          https://www.elsevier.com/tdm/userlicense/1.0/

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