Abstract
The effects of hydraulic retention times (HRTs-6, 3 and 2 h) on H2 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 H2/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 H2/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.
| Original language | English |
|---|---|
| Pages (from-to) | 188-194 |
| Number of pages | 7 |
| Journal | Bioresource Technology |
| Volume | 206 |
| DOIs | |
| Publication status | Published - 2016 Apr 1 |
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Keywords
- Butyrate
- Galactose
- Granular biomass
- Hydraulic retention time
- Lactate
ASJC Scopus subject areas
- Bioengineering
- Environmental Engineering
- Waste Management and Disposal
Cite this
HRT dependent performance and bacterial community population of granular hydrogen-producing mixed cultures fed with galactose. / Kumar, Gopalakrishnan; Sivagurunathan, Periyasamy; Park, Jeong Hoon; Park, Jong Hun; Park, Hee-Deung; Yoon, Jeong Jun; Kim, Sang Hyoun.
In: Bioresource Technology, Vol. 206, 01.04.2016, p. 188-194.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - HRT dependent performance and bacterial community population of granular hydrogen-producing mixed cultures fed with galactose
AU - Kumar, Gopalakrishnan
AU - Sivagurunathan, Periyasamy
AU - Park, Jeong Hoon
AU - Park, Jong Hun
AU - Park, Hee-Deung
AU - Yoon, Jeong Jun
AU - Kim, Sang Hyoun
PY - 2016/4/1
Y1 - 2016/4/1
N2 - The effects of hydraulic retention times (HRTs-6, 3 and 2 h) on H2 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 H2/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 H2/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.
AB - The effects of hydraulic retention times (HRTs-6, 3 and 2 h) on H2 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 H2/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 H2/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.
KW - Butyrate
KW - Galactose
KW - Granular biomass
KW - Hydraulic retention time
KW - Lactate
UR - http://www.scopus.com/inward/record.url?scp=84957064152&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84957064152&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2016.01.104
DO - 10.1016/j.biortech.2016.01.104
M3 - Article
C2 - 26859326
AN - SCOPUS:84957064152
VL - 206
SP - 188
EP - 194
JO - Bioresource Technology
JF - Bioresource Technology
SN - 0960-8524
ER -