Enhanced triacylglyceride extraction from microalgae using free nitrous acid pre-treatment

Xue Bai; Peer M. Schenk; Zhiguo Yuan; Paul A. Lant; Steven Pratt

doi:10.1016/j.apenergy.2015.04.045

Enhanced triacylglyceride extraction from microalgae using free nitrous acid pre-treatment

Xue Bai, Peer M. Schenk, Zhiguo Yuan, Paul A. Lant, Steven Pratt^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

9 Citations (Scopus)

Abstract

Triacylglyceride (TAG) recovery from algal biomass is primarily limited by the rigid algal cell envelope (cell wall and cell membrane). In this work, the effect of free nitrous acid (FNA) pre-treatment on TAG recovery from algal biomass with six different FNA concentrations is reported. Results show that at a range of low FNA concentrations (0.24-2.25mgHNO₂-NL^-1) TAG recovery was strongly enhanced with increasing FNA concentration. An FNA concentration of around 2mgHNO₂-NL^-¹ resulted in a 3.3-fold increase in fatty acid recovery over untreated algae, but higher FNA concentrations (13.49 and 26.98mgHNO₂-NL^-¹) were detrimental to TAG recovery. Analysis of the fatty acid profile revealed that the higher FNA concentrations caused a reduction in polyunsaturated fatty acids. Also, the ratio of extracted fatty acids to total lipids was significantly reduced when high FNA concentration were applied, and only non-fatty acid lipids potentially benefited from more intense FNA pre-treatments. © 2015 Elsevier Ltd.

Original language	English
Pages (from-to)	183-189
Journal	Applied Energy
Volume	154
DOIs	https://doi.org/10.1016/j.apenergy.2015.04.045
Publication status	Published - 15 Sept 2015
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Biodiesel
Fatty acid
Free nitrous acid
Microalgae
Triacylglyceride

UN SDGs

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

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title = "Enhanced triacylglyceride extraction from microalgae using free nitrous acid pre-treatment",

abstract = "Triacylglyceride (TAG) recovery from algal biomass is primarily limited by the rigid algal cell envelope (cell wall and cell membrane). In this work, the effect of free nitrous acid (FNA) pre-treatment on TAG recovery from algal biomass with six different FNA concentrations is reported. Results show that at a range of low FNA concentrations (0.24-2.25mgHNO2-NL-1) TAG recovery was strongly enhanced with increasing FNA concentration. An FNA concentration of around 2mgHNO2-NL-1 resulted in a 3.3-fold increase in fatty acid recovery over untreated algae, but higher FNA concentrations (13.49 and 26.98mgHNO2-NL-1) were detrimental to TAG recovery. Analysis of the fatty acid profile revealed that the higher FNA concentrations caused a reduction in polyunsaturated fatty acids. Also, the ratio of extracted fatty acids to total lipids was significantly reduced when high FNA concentration were applied, and only non-fatty acid lipids potentially benefited from more intense FNA pre-treatments. {\textcopyright} 2015 Elsevier Ltd.",

keywords = "Biodiesel, Fatty acid, Free nitrous acid, Microalgae, Triacylglyceride",

author = "Xue Bai and Schenk, {Peer M.} and Zhiguo Yuan and Lant, {Paul A.} and Steven Pratt",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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doi = "10.1016/j.apenergy.2015.04.045",

language = "English",

volume = "154",

pages = "183--189",

journal = "Applied Energy",

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TY - JOUR

T1 - Enhanced triacylglyceride extraction from microalgae using free nitrous acid pre-treatment

AU - Bai, Xue

AU - Schenk, Peer M.

AU - Yuan, Zhiguo

AU - Lant, Paul A.

AU - Pratt, Steven

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2015/9/15

Y1 - 2015/9/15

N2 - Triacylglyceride (TAG) recovery from algal biomass is primarily limited by the rigid algal cell envelope (cell wall and cell membrane). In this work, the effect of free nitrous acid (FNA) pre-treatment on TAG recovery from algal biomass with six different FNA concentrations is reported. Results show that at a range of low FNA concentrations (0.24-2.25mgHNO2-NL-1) TAG recovery was strongly enhanced with increasing FNA concentration. An FNA concentration of around 2mgHNO2-NL-1 resulted in a 3.3-fold increase in fatty acid recovery over untreated algae, but higher FNA concentrations (13.49 and 26.98mgHNO2-NL-1) were detrimental to TAG recovery. Analysis of the fatty acid profile revealed that the higher FNA concentrations caused a reduction in polyunsaturated fatty acids. Also, the ratio of extracted fatty acids to total lipids was significantly reduced when high FNA concentration were applied, and only non-fatty acid lipids potentially benefited from more intense FNA pre-treatments. © 2015 Elsevier Ltd.

AB - Triacylglyceride (TAG) recovery from algal biomass is primarily limited by the rigid algal cell envelope (cell wall and cell membrane). In this work, the effect of free nitrous acid (FNA) pre-treatment on TAG recovery from algal biomass with six different FNA concentrations is reported. Results show that at a range of low FNA concentrations (0.24-2.25mgHNO2-NL-1) TAG recovery was strongly enhanced with increasing FNA concentration. An FNA concentration of around 2mgHNO2-NL-1 resulted in a 3.3-fold increase in fatty acid recovery over untreated algae, but higher FNA concentrations (13.49 and 26.98mgHNO2-NL-1) were detrimental to TAG recovery. Analysis of the fatty acid profile revealed that the higher FNA concentrations caused a reduction in polyunsaturated fatty acids. Also, the ratio of extracted fatty acids to total lipids was significantly reduced when high FNA concentration were applied, and only non-fatty acid lipids potentially benefited from more intense FNA pre-treatments. © 2015 Elsevier Ltd.

KW - Biodiesel

KW - Fatty acid

KW - Free nitrous acid

KW - Microalgae

KW - Triacylglyceride

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U2 - 10.1016/j.apenergy.2015.04.045

DO - 10.1016/j.apenergy.2015.04.045

M3 - RGC 21 - Publication in refereed journal

SN - 0306-2619

VL - 154

SP - 183

EP - 189

JO - Applied Energy

JF - Applied Energy

ER -

Enhanced triacylglyceride extraction from microalgae using free nitrous acid pre-treatment

Abstract

Bibliographical note

Research Keywords

UN SDGs

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