Comprehensive study on volatile fatty acid production from Ettlia sp. residue with molecular analysis of the microbial community

Charles Seo; Woong Kim; Ho Nam Chang; Jong In Han; Yeu Chun Kim

doi:10.1016/j.algal.2016.04.015

Comprehensive study on volatile fatty acid production from Ettlia sp. residue with molecular analysis of the microbial community

Charles Seo, Woong Kim, Ho Nam Chang, Jong In Han, Yeu Chun Kim

Department of Environmental Engineering

Korea Advanced Institute of Science and Technology

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

9 Scopus citations

Abstract

The conversion of lipid extracted microalgal residues (LEμARs) into renewable energy provides a promising route for microalgal biodiesel production for various industries. In this study, volatile fatty acid (VFA) production and soluble chemical oxygen demand (SCOD) from the LEμAR of the green algae Ettlia sp. was optimized with the response surface methodology (RSM) varying the temperature from 25 to 65 °C and the food to microorganism ratio (F/M ratio) from 0.5 to 2.5 as the independent variables. A F/M ratio of 1.76 (g COD/g VSS) and temperature of 47.97 °C was found to be the optimal condition. Though the fit was rather lacking, the p-value was sufficiently significant at 1% α level validating the optimization model. Additionally, next generation sequencing (NGS) indicated significant correlations between VFA and its microbial community, revealing that an anaerobic bacterium species, Sporanaerobacter acetigenes, was a dominant VFA producer. This study shows that VFA production could indeed be a viable direction that would make the microalgae-based biofuel production competitive.

Original language	English
Pages (from-to)	161-167
Number of pages	7
Journal	Algal Research
Volume	17
DOIs	https://doi.org/10.1016/j.algal.2016.04.015
State	Published - 1 Jul 2016

Keywords

Ettlia sp.
Microalgal residue
NGS
RSM
Volatile fatty acid

UN SDGs

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

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10.1016/j.algal.2016.04.015

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title = "Comprehensive study on volatile fatty acid production from Ettlia sp. residue with molecular analysis of the microbial community",

abstract = "The conversion of lipid extracted microalgal residues (LEμARs) into renewable energy provides a promising route for microalgal biodiesel production for various industries. In this study, volatile fatty acid (VFA) production and soluble chemical oxygen demand (SCOD) from the LEμAR of the green algae Ettlia sp. was optimized with the response surface methodology (RSM) varying the temperature from 25 to 65 °C and the food to microorganism ratio (F/M ratio) from 0.5 to 2.5 as the independent variables. A F/M ratio of 1.76 (g COD/g VSS) and temperature of 47.97 °C was found to be the optimal condition. Though the fit was rather lacking, the p-value was sufficiently significant at 1% α level validating the optimization model. Additionally, next generation sequencing (NGS) indicated significant correlations between VFA and its microbial community, revealing that an anaerobic bacterium species, Sporanaerobacter acetigenes, was a dominant VFA producer. This study shows that VFA production could indeed be a viable direction that would make the microalgae-based biofuel production competitive.",

keywords = "Ettlia sp., Microalgal residue, NGS, RSM, Volatile fatty acid",

author = "Charles Seo and Woong Kim and Chang, {Ho Nam} and Han, {Jong In} and Kim, {Yeu Chun}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

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doi = "10.1016/j.algal.2016.04.015",

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AU - Seo, Charles

AU - Kim, Woong

AU - Chang, Ho Nam

AU - Han, Jong In

AU - Kim, Yeu Chun

PY - 2016/7/1

Y1 - 2016/7/1

N2 - The conversion of lipid extracted microalgal residues (LEμARs) into renewable energy provides a promising route for microalgal biodiesel production for various industries. In this study, volatile fatty acid (VFA) production and soluble chemical oxygen demand (SCOD) from the LEμAR of the green algae Ettlia sp. was optimized with the response surface methodology (RSM) varying the temperature from 25 to 65 °C and the food to microorganism ratio (F/M ratio) from 0.5 to 2.5 as the independent variables. A F/M ratio of 1.76 (g COD/g VSS) and temperature of 47.97 °C was found to be the optimal condition. Though the fit was rather lacking, the p-value was sufficiently significant at 1% α level validating the optimization model. Additionally, next generation sequencing (NGS) indicated significant correlations between VFA and its microbial community, revealing that an anaerobic bacterium species, Sporanaerobacter acetigenes, was a dominant VFA producer. This study shows that VFA production could indeed be a viable direction that would make the microalgae-based biofuel production competitive.

AB - The conversion of lipid extracted microalgal residues (LEμARs) into renewable energy provides a promising route for microalgal biodiesel production for various industries. In this study, volatile fatty acid (VFA) production and soluble chemical oxygen demand (SCOD) from the LEμAR of the green algae Ettlia sp. was optimized with the response surface methodology (RSM) varying the temperature from 25 to 65 °C and the food to microorganism ratio (F/M ratio) from 0.5 to 2.5 as the independent variables. A F/M ratio of 1.76 (g COD/g VSS) and temperature of 47.97 °C was found to be the optimal condition. Though the fit was rather lacking, the p-value was sufficiently significant at 1% α level validating the optimization model. Additionally, next generation sequencing (NGS) indicated significant correlations between VFA and its microbial community, revealing that an anaerobic bacterium species, Sporanaerobacter acetigenes, was a dominant VFA producer. This study shows that VFA production could indeed be a viable direction that would make the microalgae-based biofuel production competitive.

KW - Ettlia sp.

KW - Microalgal residue

KW - NGS

KW - RSM

KW - Volatile fatty acid

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DO - 10.1016/j.algal.2016.04.015

M3 - Article

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SN - 2211-9264

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JO - Algal Research

JF - Algal Research

ER -

Comprehensive study on volatile fatty acid production from Ettlia sp. residue with molecular analysis of the microbial community

Abstract

Keywords

UN SDGs

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