HRT dependent performance and bacterial community population of granular hydrogen-producing mixed cultures fed with galactose

Gopalakrishnan Kumar; Periyasamy Sivagurunathan; Jeong Hoon Park; Jong Hun Park; Hee Deung Park; Jeong Jun Yoon; Sang Hyoun Kim

doi:10.1016/j.biortech.2016.01.104

HRT dependent performance and bacterial community population of granular hydrogen-producing mixed cultures fed with galactose

Gopalakrishnan Kumar, Periyasamy Sivagurunathan, Jeong Hoon Park, Jong Hun Park, Hee Deung Park, Jeong Jun Yoon, Sang Hyoun Kim

School of Civil, Environmental and Architectural Engineering

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

61 Citations (Scopus)

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	https://doi.org/10.1016/j.biortech.2016.01.104
Publication status	Published - 2016 Apr 1

Keywords

Butyrate
Galactose
Granular biomass
Hydraulic retention time
Lactate

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2016.01.104

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title = "HRT dependent performance and bacterial community population of granular hydrogen-producing mixed cultures fed with galactose",

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.",

keywords = "Butyrate, Galactose, Granular biomass, Hydraulic retention time, Lactate",

author = "Gopalakrishnan Kumar and Periyasamy Sivagurunathan and Park, {Jeong Hoon} and Park, {Jong Hun} and Park, {Hee Deung} and Yoon, {Jeong Jun} and Kim, {Sang Hyoun}",

note = "Funding Information: This work was supported by National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIP ) (No. 2014R1A2A2A04005475 ). Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd.",

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doi = "10.1016/j.biortech.2016.01.104",

language = "English",

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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

N1 - Funding Information: This work was supported by National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIP ) (No. 2014R1A2A2A04005475 ). Publisher Copyright: © 2016 Elsevier Ltd.

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

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SP - 188

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JO - Bioresource technology

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ER -

HRT dependent performance and bacterial community population of granular hydrogen-producing mixed cultures fed with galactose

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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