Abstract
Although numerous laboratory-based analytical techniques were developed and tested over the last five or six decades, industrial-scale algal oil extraction can be considered to be at its infancy.
Cost-effective, industrial-scale algal lipid extraction has been considered only after the advent of the algal biofuel industry. Presently, there is clearly a dearth of literature or reported results from commercial algal extraction technologies. When compared to land-based oil-seed crops, several fundamental differences exist for algal lipid extraction. Starting with the need for cost-effective harvesting and dewatering of dilute algal cultures (with 0.015–0.03 % solids) to differences in cell wall chemistry, and from the unsuitability of standard oil-seed pressing techniques to the need for cell disruption before drying, create unique challenges for microalgal lipid extraction. The present chapter discusses the limitations, challenges, and findings from numerous laboratory-based cell disruption and lipid extraction experiments and analytical techniques developed specifically to characterize or quantify algal lipids for nutraceutical, aquacultural, fine-chemical, or other value-added applications. Some potential industrial-scale, lipid extraction technologies are also discussed.
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List of Abbreviations
List of Abbreviations
- BD20:
-
Solvent mixture with 20 % ethanol and 80 % biodiesel
- BD40:
-
Solvent mixture with 40 % ethanol and 60 % biodiesel
- CFLES:
-
Continuous flow lipid extraction system
- DAG:
-
Diacylglycerols
- FAME:
-
Fatty acid methyl esters
- FFA:
-
Free fatty acids
- GL:
-
Glycolipids
- HTL:
-
Hydrothermal Liquefaction
- MAG:
-
Monoacylglycerols
- NL:
-
Neutral lipids
- PL:
-
Phospholipids
- PLE:
-
Pressurized lipid extraction
- TAG:
-
Triacylglycerols
- SEM:
-
Scanning electron microscope
- SFE:
-
Supercritical fluid extraction
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Theegala, C.S. (2015). Algal Cell Disruption and Lipid Extraction: A Review on Current Technologies and Limitations. In: Prokop, A., Bajpai, R., Zappi, M. (eds) Algal Biorefineries. Springer, Cham. https://doi.org/10.1007/978-3-319-20200-6_13
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DOI: https://doi.org/10.1007/978-3-319-20200-6_13
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