LAPSE:2018.0318
Published Article
LAPSE:2018.0318
Steam Explosion and Vibrating Membrane Filtration to Improve the Processing Cost of Microalgae Cell Disruption and Fractionation
Esther Lorente, Monika Hapońska, Ester Clavero, Carles Torras, Joan Salvadó
July 31, 2018
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.
Keywords
cell disruption, costs, dynamic membrane filtration, fractionation, microalgae, steam explosion
Subject
Suggested Citation
Lorente E, Hapońska M, Clavero E, Torras C, Salvadó J. Steam Explosion and Vibrating Membrane Filtration to Improve the Processing Cost of Microalgae Cell Disruption and Fractionation. (2018). LAPSE:2018.0318
Author Affiliations
Lorente E: Catalonia Institute for Energy Research, IREC, Marcel·lí Domingo 2, 43007 Tarragona, Catalonia, Spain
Hapońska M: Chemical Engineering Department, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Catalonia, Spain
Clavero E: Catalonia Institute for Energy Research, IREC, Marcel·lí Domingo 2, 43007 Tarragona, Catalonia, Spain [ORCID]
Torras C: Chemical Engineering Department, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Catalonia, Spain [ORCID]
Salvadó J: Chemical Engineering Department, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Catalonia, Spain
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Journal Name
Processes
Volume
6
Issue
4
Article Number
E28
Year
2018
Publication Date
2018-03-22
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr6040028, Publication Type: Journal Article
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LAPSE:2018.0318
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doi:10.3390/pr6040028
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Jul 31, 2018
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CC BY 4.0
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