Biohydrogen fermentation of galactose at various substrate concentrations in an immobilized system and its microbial correspondence

Periyasamy Sivagurunathan, Arivalagan Pugazhendhi, Gopalakrishnan Kumar, Jong Hun Park, Sang Hyoun Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The effects of substrate concentration on fermentative hydrogen production from galactose at a fixed hydraulic retention time of 12 h were investigated in an immobilized continuously stirred tank reactor. Peak hydrogen production rate and hydrogen yield of 9.57 L/L-d and 1.10 mol/mol galactoseadded, respectively, were obtained at a feed substrate concentration of 30 g/L and an organic loading rate of 60 L/L-d. Quantitative polymerase chain reaction analysis showed that the variations in the performance resulted primarily from metabolic alterations within the metabolism of the established microbial community rather than modifications in the population. The results obtained showed that optimal substrate concentration is essential for the efficient, continuous production of hydrogen from galactose.

Original languageEnglish
Pages (from-to)559-564
Number of pages6
JournalJournal of Bioscience and Bioengineering
Volume125
Issue number5
DOIs
Publication statusPublished - 2018 May

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

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