Biohydrogen Production and Proton Exchange Membrane Fuel Cells
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Questions and Answers

What is the specific hydrogen production rate of C.saccharolyticus?

  • 11-20 mmol/g cell/h
  • 31-40 mmol/g cell/h
  • 3-7 mmol/g cell/h (correct)
  • 21-30 mmol/g cell/h

    • In dark fermentation, how many mol of hydrogen can be produced from 1 mol of hexose with acetate and butyrate as by-products?

  • 7-9
  • 10-12
  • 2-4 (correct)
  • 5-7

    • What is the yield of hydrogen from glucose in continuous mode for C.saccharolyticus?

  • 3.1 mol H2/mol glucose (correct)
  • 1.1 mol H2/mol glucose
  • 4.2 mol H2/mol glucose
  • 2.3 mol H2/mol glucose

    • Which microorganism has a maximal production rate of 4.5 mmol/L/h for hydrogen?

    <p>C.saccharolyticus</p> Signup and view all the answers

    What is the main problem faced by dark fermentation for biohydrogen production?

    <p>Low yield and energy efficiency</p> Signup and view all the answers

    What is the best solution proposed to improve the efficiency in biohydrogen production?

    <p>Sequentially use dark and photofermentation processes</p> Signup and view all the answers

    Which process allows organic acids to be used by photosynthetic bacteria for further hydrogen production?

    <p><strong>Photofermentation</strong></p> Signup and view all the answers

    What can organic acids produced in dark fermentation be further converted into?

    <p><strong>Methane</strong></p> Signup and view all the answers

    What is the maximal production rate of hydrogen for Thermococcus kodakaraensis?

    <p>8.4 mmol/L/h</p> Signup and view all the answers

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