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Incubation time after pulsed electric field treatment of microalgae enhances the efficiency of extraction processes and enables the reduction of specific treatment energy.
Bioresour Technol. 2018 Dec; 269:179-187.BT

Abstract

Pulsed Electric Field (PEF) pre-treatment, applied on fresh microalgae Auxenochlorella protothecoides, induces spontaneous release of a substantial water fraction and enables subsequent lipid extraction using ethanol-hexane blends. In this study, fresh microalgae suspensions were treated with PEF and incubated under inert conditions. Incubation promotes the release of ions and carbohydrates and increases the yields of subsequent lipid extraction thus enabling a considerable reduction of PEF-treatment energy. With a 20 h incubation period at 25 °C, almost total lipid extraction is achieved with a specific PEF-treatment energy of only 0.25 MJ/kgDW. Incubation on ice remains beneficial but less efficient than at 25 °C. Additionally, incubating microalgae cells in suspension at 100gDW/L or in a dense paste, was almost equally efficient. Correlation between the different results suggests that spontaneous release of ions and carbohydrates facilitates more successful lipid extraction. A direct causality between the two phenomena remains to be demonstrated.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Silve A
Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), Eggenstein-Leopoldshafen, Germany. Electronic address: aude.silve@kit.edu.
Kian CB
Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), Eggenstein-Leopoldshafen, Germany.
Papachristou I
Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), Eggenstein-Leopoldshafen, Germany.
Kubisch C
Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), Eggenstein-Leopoldshafen, Germany.
Nazarova N
Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), Eggenstein-Leopoldshafen, Germany.
Wüstner R
Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), Eggenstein-Leopoldshafen, Germany.
Leber K
Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), Eggenstein-Leopoldshafen, Germany.
Strässner R
Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), Eggenstein-Leopoldshafen, Germany.
Frey W
Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology (IHM), Eggenstein-Leopoldshafen, Germany.

MeSH

CarbohydratesChlorophytaElectricityLipidsMicroalgae

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30172181

Citation

Silve, Aude, et al. "Incubation Time After Pulsed Electric Field Treatment of Microalgae Enhances the Efficiency of Extraction Processes and Enables the Reduction of Specific Treatment Energy." Bioresource Technology, vol. 269, 2018, pp. 179-187.
Silve A, Kian CB, Papachristou I, et al. Incubation time after pulsed electric field treatment of microalgae enhances the efficiency of extraction processes and enables the reduction of specific treatment energy. Bioresour Technol. 2018;269:179-187.
Silve, A., Kian, C. B., Papachristou, I., Kubisch, C., Nazarova, N., Wüstner, R., Leber, K., Strässner, R., & Frey, W. (2018). Incubation time after pulsed electric field treatment of microalgae enhances the efficiency of extraction processes and enables the reduction of specific treatment energy. Bioresource Technology, 269, 179-187. https://doi.org/10.1016/j.biortech.2018.08.060
Silve A, et al. Incubation Time After Pulsed Electric Field Treatment of Microalgae Enhances the Efficiency of Extraction Processes and Enables the Reduction of Specific Treatment Energy. Bioresour Technol. 2018;269:179-187. PubMed PMID: 30172181.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Incubation time after pulsed electric field treatment of microalgae enhances the efficiency of extraction processes and enables the reduction of specific treatment energy. AU - Silve,Aude, AU - Kian,Chua Boon, AU - Papachristou,Ioannis, AU - Kubisch,Christin, AU - Nazarova,Natalja, AU - Wüstner,Rüdiger, AU - Leber,Klaus, AU - Strässner,Ralf, AU - Frey,Wolfgang, Y1 - 2018/08/18/ PY - 2018/06/15/received PY - 2018/08/15/revised PY - 2018/08/16/accepted PY - 2018/9/2/pubmed PY - 2018/10/12/medline PY - 2018/9/2/entrez KW - Biofuel KW - Electropermeabilisation KW - Electroporation KW - Lipid KW - Microalgae KW - PEF treatment SP - 179 EP - 187 JF - Bioresource technology JO - Bioresour Technol VL - 269 N2 - Pulsed Electric Field (PEF) pre-treatment, applied on fresh microalgae Auxenochlorella protothecoides, induces spontaneous release of a substantial water fraction and enables subsequent lipid extraction using ethanol-hexane blends. In this study, fresh microalgae suspensions were treated with PEF and incubated under inert conditions. Incubation promotes the release of ions and carbohydrates and increases the yields of subsequent lipid extraction thus enabling a considerable reduction of PEF-treatment energy. With a 20 h incubation period at 25 °C, almost total lipid extraction is achieved with a specific PEF-treatment energy of only 0.25 MJ/kgDW. Incubation on ice remains beneficial but less efficient than at 25 °C. Additionally, incubating microalgae cells in suspension at 100gDW/L or in a dense paste, was almost equally efficient. Correlation between the different results suggests that spontaneous release of ions and carbohydrates facilitates more successful lipid extraction. A direct causality between the two phenomena remains to be demonstrated. SN - 1873-2976 UR - https://www.unboundmedicine.com/medline/citation/30172181/Incubation_time_after_pulsed_electric_field_treatment_of_microalgae_enhances_the_efficiency_of_extraction_processes_and_enables_the_reduction_of_specific_treatment_energy_ DB - PRIME DP - Unbound Medicine ER -