HRT dependent performance and bacterial community population of granular hydrogen-producing mixed cultures fed with galactose

Gopalakrishnan Kumar, Periyasamy Sivagurunathan, Jeong Hoon Park, Jong Hun Park, Hee Deung Park, Jeong Jun Yoon, Sang Hyoun Kim

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The effects of hydraulic retention times (HRTs-6, 3 and 2 h) on H 2 production, operational stability and bacterial population response in a continuously stirred tank reactor (CSTR) were evaluated using galactose. A peak hydrogen production rate (HPR) of 25.9 L H 2 /L-d was obtained at a 3 h HRT with an organic loading rate (OLR) of 120 g/L-d, while the maximum hydrogen yield (HY) of 2.21 mol H 2 /mol galactose was obtained at a 6 h HRT (60 g galactose/L-d). Butyrate was dominant and the lactate concentration increased as HRT decreased, which significantly affected the HY. Biomass concentration (VSS) decreased from 16 to 3 g/L at a 2 h HRT, leading to failure. A 3 h HRT supported the favorable growth of Clostridium species, as indicated by an increase in their populations from 25.4% to 27%, while significantly reducing Bacilli populations from 61.6% to 54.2%, indicating that this was the optimal condition.

Original languageEnglish
Pages (from-to)188-194
Number of pages7
JournalBioresource Technology
Volume206
DOIs
Publication statusPublished - 2016 Apr 1

Fingerprint

Galactose
Hydrogen
hydrogen
Clostridium
Butyrates
Bacilli
Hydrogen production
Lactic Acid
Biomass
Hydraulics
hydraulics
biomass
rate

All Science Journal Classification (ASJC) codes

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

Cite this

Kumar, Gopalakrishnan ; Sivagurunathan, Periyasamy ; Park, Jeong Hoon ; Park, Jong Hun ; Park, Hee Deung ; Yoon, Jeong Jun ; Kim, Sang Hyoun. / HRT dependent performance and bacterial community population of granular hydrogen-producing mixed cultures fed with galactose. In: Bioresource Technology. 2016 ; Vol. 206. pp. 188-194.
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HRT dependent performance and bacterial community population of granular hydrogen-producing mixed cultures fed with galactose. / Kumar, Gopalakrishnan; Sivagurunathan, Periyasamy; Park, Jeong Hoon; Park, Jong Hun; Park, Hee Deung; Yoon, Jeong Jun; Kim, Sang Hyoun.

In: Bioresource Technology, Vol. 206, 01.04.2016, p. 188-194.

Research output: Contribution to journalArticle

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