Lactic acid as a substrate for fermentative hydrogen production

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15 Citations (Scopus)

Abstract

Soil was used as seed without pretreatment for the fermentation of lactate in order to produce H 2. When the pH was kept at a constant level, H 2 production occurred in three steps. The first was the production of small amounts of H 2 during the initial growth of the microflora. Then, after a reasonably long period of inactivity during the cultivation stage, a large amount of H 2 was produced in additional two steps. It was found that the reduction of the pH after the initial growth phase had a positive effect on the H 2 yield. After cell growth at pH 6 and cultivation at pH 5, a total H 2 yield of 154 mmol l -1 was achieved. It was found that acetate was essential for the rapid H 2 formation. On the other hand, even small initial concentrations of butyrate impeded the H 2 formation.

Original languageEnglish
Pages (from-to)16967-16973
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number22
DOIs
Publication statusPublished - 2012 Nov 1

Keywords

  • Batch fermentation
  • Kinetic analysis
  • Metabolic pathway
  • Soil

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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