Application of central composite design in the optimization of lipid yield from Scenedesmus obliquus microalgae by ultrasound-assisted solvent extraction

Alexander L. Ido; Mark Daniel G. de Luna; Sergio C. Capareda; Amado L. Maglinao; Hyungseok Nam

doi:10.1016/j.energy.2018.04.171

Application of central composite design in the optimization of lipid yield from Scenedesmus obliquus microalgae by ultrasound-assisted solvent extraction

Alexander L. Ido, Mark Daniel G. de Luna, Sergio C. Capareda, Amado L. Maglinao, Hyungseok Nam

School of Mechanical Engineering

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

60 Scopus citations

Abstract

The production of carbon-neutral, renewable, and environment-friendly biofuels is currently being implemented worldwide to mitigate the excessive use of petroleum-based fuels. Fast-growing lipid-producing microalgae, such as Scenedesmus obliquus, are considered ideal feedstocks for biofuel production. In this study, the separation of lipids from Scenedesmus obliquus microalgae was done through ultrasound-assisted solvent extraction (UASE) process using various solvent mixtures. The effects of resonance amplitude, n-hexane and isopropanol (HIP) ratio, and reaction time on lipid yield were evaluated. Lipid yield optimization was done through central composite design (CCD) of the response surface methodology (RSM). Lipid yield of 26.63% was obtained at 50 μm resonance amplitude and 4 v/v HIP ratio. The extracted lipids, mainly composed of fatty acids and esters, had a high heating value (HHV) of 35.38 MJ kg⁻¹. Overall, the results of the study validate the effectiveness of the UASE process for microalgal lipid extraction.

Original language	English
Pages (from-to)	949-956
Number of pages	8
Journal	Energy
Volume	157
DOIs	https://doi.org/10.1016/j.energy.2018.04.171
State	Published - 15 Aug 2018

Keywords

Lipid extraction
Microalgae
Optimization
Scenedesmus obliquus
Ultrasound

UN SDGs

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

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10.1016/j.energy.2018.04.171

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title = "Application of central composite design in the optimization of lipid yield from Scenedesmus obliquus microalgae by ultrasound-assisted solvent extraction",

abstract = "The production of carbon-neutral, renewable, and environment-friendly biofuels is currently being implemented worldwide to mitigate the excessive use of petroleum-based fuels. Fast-growing lipid-producing microalgae, such as Scenedesmus obliquus, are considered ideal feedstocks for biofuel production. In this study, the separation of lipids from Scenedesmus obliquus microalgae was done through ultrasound-assisted solvent extraction (UASE) process using various solvent mixtures. The effects of resonance amplitude, n-hexane and isopropanol (HIP) ratio, and reaction time on lipid yield were evaluated. Lipid yield optimization was done through central composite design (CCD) of the response surface methodology (RSM). Lipid yield of 26.63% was obtained at 50 μm resonance amplitude and 4 v/v HIP ratio. The extracted lipids, mainly composed of fatty acids and esters, had a high heating value (HHV) of 35.38 MJ kg−1. Overall, the results of the study validate the effectiveness of the UASE process for microalgal lipid extraction.",

keywords = "Lipid extraction, Microalgae, Optimization, Scenedesmus obliquus, Ultrasound",

author = "Ido, {Alexander L.} and {de Luna}, {Mark Daniel G.} and Capareda, {Sergio C.} and Maglinao, {Amado L.} and Hyungseok Nam",

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doi = "10.1016/j.energy.2018.04.171",

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AU - Ido, Alexander L.

AU - de Luna, Mark Daniel G.

AU - Capareda, Sergio C.

AU - Maglinao, Amado L.

AU - Nam, Hyungseok

PY - 2018/8/15

Y1 - 2018/8/15

N2 - The production of carbon-neutral, renewable, and environment-friendly biofuels is currently being implemented worldwide to mitigate the excessive use of petroleum-based fuels. Fast-growing lipid-producing microalgae, such as Scenedesmus obliquus, are considered ideal feedstocks for biofuel production. In this study, the separation of lipids from Scenedesmus obliquus microalgae was done through ultrasound-assisted solvent extraction (UASE) process using various solvent mixtures. The effects of resonance amplitude, n-hexane and isopropanol (HIP) ratio, and reaction time on lipid yield were evaluated. Lipid yield optimization was done through central composite design (CCD) of the response surface methodology (RSM). Lipid yield of 26.63% was obtained at 50 μm resonance amplitude and 4 v/v HIP ratio. The extracted lipids, mainly composed of fatty acids and esters, had a high heating value (HHV) of 35.38 MJ kg−1. Overall, the results of the study validate the effectiveness of the UASE process for microalgal lipid extraction.

AB - The production of carbon-neutral, renewable, and environment-friendly biofuels is currently being implemented worldwide to mitigate the excessive use of petroleum-based fuels. Fast-growing lipid-producing microalgae, such as Scenedesmus obliquus, are considered ideal feedstocks for biofuel production. In this study, the separation of lipids from Scenedesmus obliquus microalgae was done through ultrasound-assisted solvent extraction (UASE) process using various solvent mixtures. The effects of resonance amplitude, n-hexane and isopropanol (HIP) ratio, and reaction time on lipid yield were evaluated. Lipid yield optimization was done through central composite design (CCD) of the response surface methodology (RSM). Lipid yield of 26.63% was obtained at 50 μm resonance amplitude and 4 v/v HIP ratio. The extracted lipids, mainly composed of fatty acids and esters, had a high heating value (HHV) of 35.38 MJ kg−1. Overall, the results of the study validate the effectiveness of the UASE process for microalgal lipid extraction.

KW - Lipid extraction

KW - Microalgae

KW - Optimization

KW - Scenedesmus obliquus

KW - Ultrasound

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DO - 10.1016/j.energy.2018.04.171

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JO - Energy

JF - Energy

ER -

Application of central composite design in the optimization of lipid yield from Scenedesmus obliquus microalgae by ultrasound-assisted solvent extraction

Abstract

Keywords

UN SDGs

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