Author, as appears in the article.: Lorente, Esther Haponska, Monika Clavero, Ester Torras, Caries Salvado, Joan

Department: Enginyeria Química

e-ISSN: 2227-9717

URV's Author/s: Salvadó Rovira, Joan / Torras Font, Carles

Keywords: Steam explosion Microalgae Fractionation Dynamic membrane filtration Costs Cell disruption

Abstract: The aim of this study is to explore an innovative downstream route for microalgae processing to reduce cost production. Experiments have been carried out on cell disruption and fractionation stages to recover lipids, sugars, and proteins. Steam explosion and dynamic membrane filtration were used as unit operations. The species tested were Nannochloropsis gaditana, Chlorella sorokiniana, and Dunaliella tertiolecta with different cell wall characteristics. Acid-catalysed steam explosion permitted cell disruption, as well as the hydrolysis of carbohydrates and partial hydrolysis of proteins. This permitted a better access to non-polar solvents for lipid extraction. Dynamic filtration was used to moderate the impact of fouling. Filtration enabled two streams: A permeate containing water and monosaccharides and a low-volume retentate containing the lipids and proteins. The necessary volume of solvent to extract the lipids is thus much lower. An estimation of operational costs of both steam explosion and membrane filtration was performed. The results show that the steam explosion operation cost varies between 0.005 $/kg and 0.014 $/kg of microalgae dry sample, depending on the cost of fuel. Membrane filtration cost in fractionation was estimated at 0.12 $/kg of microalgae dry sample.

Thematic Areas: Process chemistry and technology Engineering, chemical Engenharias ii Ciências biológicas ii Chemical engineering (miscellaneous) Bioengineering

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 22279717

Author's mail: carles.torras@urv.cat joan.salvado@urv.cat

Author identifier: 0000-0002-3112-3519 0000-0003-2238-6082

Record's date: 2023-02-18

Journal volume: 6

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.mdpi.com/2227-9717/6/4/28

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Processes. 6 (4):

APA: Lorente, Esther Haponska, Monika Clavero, Ester Torras, Caries Salvado, Joan (2018). Steam explosion and vibrating membrane filtration to improve the processing cost of microalgae cell disruption and fractionation. Processes, 6(4), -. DOI: 10.3390/pr6040028

Article's DOI: 10.3390/pr6040028

Entity: Universitat Rovira i Virgili

Journal publication year: 2018

Publication Type: Journal Publications