Metabolic and energetic aspects of biohydrogen production of Clostridium tyrobutyricum: The effects of hydraulic retention time and peptone addition

Liang Ming Whang, Che An Lin, I. Chun Liu, Chao Wei Wu, Hai Hsuan Cheng

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21 Citations (Scopus)

Abstract

This study evaluates the microbial metabolism and energy demand in fermentative biohydrogen production using Clostridium tyrobutyricum FYa102 at different hydraulic retention times (HRT) over a period of 1-18h. The hydrogen yield shows a positive correlation with the butyrate yield, the B/A ratio, and the Y H2/2(Y HAc+Y HBu) ratio, but a negative correlation with the lactate yield. A decrease in HRT, which is accompanied by an increased biomass growth, tends to decrease the B/A ratio, due presumably to a higher energy demand for microbial growth. The production of lactate at a low HRT, however, may involve an unfavorable change in e - equiv distribution to result in a reduced hydrogen production. Finally, the relatively high hydrogen yields observed in the bioreactor with the peptone addition may be ascribed to the utilization of peptone as an additional energy and/or amino-acid source, thus reducing the glucose demand for biomass growth during the hydrogen production process.

Original languageEnglish
Pages (from-to)8378-8383
Number of pages6
JournalBioresource technology
Volume102
Issue number18
DOIs
Publication statusPublished - 2011 Sep

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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