Microbial responses to various process disturbances in a continuous hydrogen reactor fed with galactose

Gopalakrishnan Kumar; Jeong Hoon Park; Periyasamy Sivagurunathan; Sang Hoon Lee; Hee Deung Park; Sang Hyoun Kim

doi:10.1016/j.jbiosc.2016.08.006

Microbial responses to various process disturbances in a continuous hydrogen reactor fed with galactose

Gopalakrishnan Kumar, Jeong Hoon Park, Periyasamy Sivagurunathan, Sang Hoon Lee, Hee Deung Park, Sang Hyoun Kim

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

In this study, microbial responses of a continuous hydrogen reactor fed with galactose have been investigated. Process disturbances reduced H₂ production performance as well as large fluctuations in microbial diversity. The peak values of the hydrogen yield (HY) was not influenced greatly during the steady state period, and accounted as 2.01 ± 0.05 and 2.14 ± 0.03 mol/mol galactose_added, while hydraulic retention time (HRT) was at 12 and 8 h, respectively. Microbial community analysis via 454 pyrosequencing revealed that functional redundancy following changes in the microbial community distribution led to the stability of the fermentation performance. The butyrate to acetate (B/A) ratio well correlated with changes in the microbial community. The energy generation rate and energy yield resulted in the peak values of 134 kJ/L-d and 612 kJ/mol_added.

Original language	English
Pages (from-to)	216-222
Number of pages	7
Journal	Journal of Bioscience and Bioengineering
Volume	123
Issue number	2
DOIs	https://doi.org/10.1016/j.jbiosc.2016.08.006
Publication status	Published - 2017 Feb 1

Bibliographical note

Publisher Copyright:
© 2016 The Society for Biotechnology, Japan

Keywords

454 Pyrosequencing
Biohydrogen
Energy generation rate
Functional redundancy
Microbial consortia

ASJC Scopus subject areas

Biotechnology
Bioengineering
Applied Microbiology and Biotechnology

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10.1016/j.jbiosc.2016.08.006

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abstract = "In this study, microbial responses of a continuous hydrogen reactor fed with galactose have been investigated. Process disturbances reduced H2 production performance as well as large fluctuations in microbial diversity. The peak values of the hydrogen yield (HY) was not influenced greatly during the steady state period, and accounted as 2.01 ± 0.05 and 2.14 ± 0.03 mol/mol galactoseadded, while hydraulic retention time (HRT) was at 12 and 8 h, respectively. Microbial community analysis via 454 pyrosequencing revealed that functional redundancy following changes in the microbial community distribution led to the stability of the fermentation performance. The butyrate to acetate (B/A) ratio well correlated with changes in the microbial community. The energy generation rate and energy yield resulted in the peak values of 134 kJ/L-d and 612 kJ/moladded.",

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AU - Sivagurunathan, Periyasamy

AU - Lee, Sang Hoon

AU - Park, Hee Deung

AU - Kim, Sang Hyoun

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KW - Energy generation rate

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Microbial responses to various process disturbances in a continuous hydrogen reactor fed with galactose

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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