Journal
BIORESOURCE TECHNOLOGY
Volume 240, Issue -, Pages 207-213Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.03.062
Keywords
UASBR; Galactose; Hybrid immobilized cells; High-rate; Hydrogen
Funding
- National Research Foundation of Korea [2016K2A9A1A01951892]
- Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2016H1D3A1908953]
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This study evaluated the effect of repeated heat treatment towards the enhancement of hydrogen fermentation from galactose in an upflow anaerobic sludge blanket reactor with the hydraulic retention time of 6 h and the operation temperature of 37 degrees C. The hydrogen production rate (HPR) and hydrogen yield (HY) gradually increased up to 9.1 L/L/d and 1.1 mol/mol galactose, respectively, until the 33rd day of operation. When heat treatment at 80 degrees C for 30 min was applied, hydrogen production performance was enhanced by 37% with the enrichment of hydrogen producing bacteria population. The HPR and HY were achieved at 12.5 L/L/d and 1.5 mol/mol hexose, respectively, during further 30 cycles of reactor operation. The repeated heat treatment would be a viable strategy to warrant reliable continuous hydrogen production using mixed culture. (C) 2017 Elsevier Ltd. All rights reserved.
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