Improvement of hydrogen fermentation of galactose by combined inoculation strategy

Periyasamy Sivagurunathan, Parthiban Anburajan, Gopalakrishnan Kumar, Pugazhendhi Arivalagan, Péter Bakonyi, Sang Hyoun Kim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

This study evaluated the feasibility of anaerobic hydrogen fermentation of galactose, a red algal biomass sugar, using individual and combined mixed culture inocula. Heat-treated (90°C, 30 min) samples of granular sludge (GS) and suspended digester sludge (SDS) were used as inoculum sources. The type of mixed culture inoculum played an important role in hydrogen production from galactose. Between two inocula, granular sludge showed higher hydrogen production rate (HPR) and hydrogen yield (HY) of 2.2 L H2/L-d and 1.09 mol H2/mol galactoseadded, respectively. Combined inoculation (GS + SDS) led to an elevated HPR and HY of 3.1 L H2/L-d and 1.28 mol H2/mol galactoseadded, respectively. Acetic and butyric acids are the major organic acids during fermentation. Quantitative polymerase chain reaction (qPCR) revealed that the mixed culture generated using the combined inoculation contained a higher cluster I Clostridium abundance than the culture produced using the single inoculum.

Original languageEnglish
Pages (from-to)353-357
Number of pages5
JournalJournal of Bioscience and Bioengineering
Volume123
Issue number3
DOIs
Publication statusPublished - 2017 Mar 1

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

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