HRT dependent performance and bacterial community population of granular hydrogen-producing mixed cultures fed with galactose
- Authors
- Kumar, Gopalakrishnan; Sivagurunathan, Periyasamy; Park, Jeong-Hoon; Park, Jong-Hun; Park, Hee-Deung; Yoon, Jeong-Jun; Kim, Sang-Hyoun
- Issue Date
- 4월-2016
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Granular biomass; Galactose; Hydraulic retention time; Butyrate; Lactate
- Citation
- BIORESOURCE TECHNOLOGY, v.206, pp.188 - 194
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 206
- Start Page
- 188
- End Page
- 194
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/89144
- DOI
- 10.1016/j.biortech.2016.01.104
- ISSN
- 0960-8524
- 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. (C) 2016 Elsevier Ltd. All rights reserved.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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