Shift of microbial community structure by substrate level in dynamic membrane bioreactor for biohydrogen production

Do Hyung Kim, Jeong Hoon Park, Sang Hyoun Kim, Gopalakrishnan Kumar, Byung Don Lee, Sunil Kumar, Jeong Jun Yoon

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The aim of this study was to evaluate the feasibility of biological hydrogen production (BHP) in a dynamic membrane bioreactor. Hydraulic retention time (HRT) was varied from 1 to 12 hours, and the microbial communities were analyzed. The major hydrogen-producing bacterium was Clostridium chromiireducens, which was enriched up to 82% of the total bacteria with a 2 hour HRT, while Enterobacter cloacae was also observed in the range of 0.2% to 34.4% of total bacteria. When the level of the substrate in the reactor was low (<0.5 g/L), BHP dropped dramatically, and Sporolactobacillus putidus increased to 8.8% of the total bacteria. Differences in substrate affinity between S. putidus and C. chromiireducens likely promoted the dominance of S. putidus, which is more favorable for growth and metabolism at low substrate concentrations, and caused changes in the microbial community.

Original languageEnglish
JournalInternational Journal of Energy Research
DOIs
Publication statusAccepted/In press - 2020

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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