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Extraction of lipids from algae using supercritical carbon dioxide
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-5285-1136
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-3687-6173
Molecular Microbiology Laboratory, Biotechnology Department, Indian Institute of Technology (IIT-R), Roorkee, India.
Bioenergy Research Laboratory, Department of Polymer & Process Engineering, Indian Institute of Technology Roorkee (Saharanpur Campus), Saharanpur, India.
2020 (English)In: Green Sustainable Process for Chemical and Environmental Engineering and Science: Supercritical Carbon Dioxide as Green Solvent / [ed] Inamuddin, Abdullah M. Asiri, and Arun M. Isloor, Elsevier, 2020, p. 17-39Chapter in book (Other academic)
Abstract [en]

Microalgal oils are considered an important source of industrially valuable oleochemicals with significant applications ranging from the energy to pharmaceutical sectors. Industrial production of microalgal oil is emerging rapidly; however, the high cost associated with downstream processes may constrain this process. Oils are accumulated intracellularly in oleaginous microalgae in the form of lipid droplets, which in turn require cell wall disruption followed by extraction in order to recover them. Disruption of the microalgal cell is very challenging owing to its distinctive features like high water content, hard cell wall, presence of algaenan, and sporopollenin like biopolymers that in turn create hurdles in efficient extraction of lipids. Various conventional pretreatment methods have been explored to rupture the cellular integrity of microalgal cells to enhance lipid extraction, and each method has certain advantages and disadvantages. Supercritical fluid extraction is the oldest technique for the extraction of valuable compounds from microalgae and is considered an alternative to conventional solvent extraction methods. It has several advantageous features such as being free from organic solvents (and their disposal), environment-friendly, and operating at a mild range of temperature (40–80°C). CO2 is considered to be an ideal supercritical fluid due to its non-toxic, non-flammable, and lipophilic nature. In this chapter, use of supercritical carbon dioxide extraction of lipids from microalgae is discussed and compared with other available lipid extraction methods.

Place, publisher, year, edition, pages
Elsevier, 2020. p. 17-39
Keywords [en]
Microalgae, Lipids, Lipid extraction techniques, Supercritical fluid extraction, Supercritical CO2 extraction
National Category
Bioprocess Technology
Research subject
Biochemical Process Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-78849DOI: 10.1016/b978-0-12-817388-6.00002-7OAI: oai:DiVA.org:ltu-78849DiVA, id: diva2:1429580
Note

ISBN för värdpublikation: 978-0-12-817388-6

Available from: 2020-05-11 Created: 2020-05-11 Last updated: 2020-05-18Bibliographically approved

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