TY - JOUR
T1 - Microbial responses to various process disturbances in a continuous hydrogen reactor fed with galactose
AU - Kumar, Gopalakrishnan
AU - Park, Jeong Hoon
AU - Sivagurunathan, Periyasamy
AU - Lee, Sang Hoon
AU - Park, Hee Deung
AU - Kim, Sang Hyoun
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2014R1A2A2A04005475).
Publisher Copyright:
© 2016 The Society for Biotechnology, Japan
PY - 2017/2/1
Y1 - 2017/2/1
N2 - 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.
AB - 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.
KW - 454 Pyrosequencing
KW - Biohydrogen
KW - Energy generation rate
KW - Functional redundancy
KW - Microbial consortia
UR - http://www.scopus.com/inward/record.url?scp=84994887833&partnerID=8YFLogxK
U2 - 10.1016/j.jbiosc.2016.08.006
DO - 10.1016/j.jbiosc.2016.08.006
M3 - Article
C2 - 27614820
AN - SCOPUS:84994887833
SN - 1389-1723
VL - 123
SP - 216
EP - 222
JO - Journal of Bioscience and Bioengineering
JF - Journal of Bioscience and Bioengineering
IS - 2
ER -