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Related Experiment Video

Updated: Aug 8, 2025

Analysis of Fatty Acid Content and Composition in Microalgae
07:44

Analysis of Fatty Acid Content and Composition in Microalgae

Published on: October 1, 2013

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Intensifying extraction of biomolecules from macroalgae using vortex based hydrodynamic cavitation device.

Rochak Mittal1, Vivek V Ranade1

  • 1Multiphase Flows, Reactors and Intensification Group, Bernal Institute, University of Limerick, Ireland.

Ultrasonics Sonochemistry
|March 4, 2023
PubMed
Summary

Hydrodynamic cavitation (HC) significantly enhances the extraction of valuable compounds like phycoerythrin from macroalgae. This vortex-based method offers a 2 to 20 times faster and higher yield extraction compared to traditional methods.

Keywords:
Palmaria palmataProcess intensificationR-phycoerythrinValorisation

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Area of Science:

  • Biotechnology
  • Renewable Resources
  • Marine Biology

Background:

  • Macroalgae are a rich source of valuable biomolecules and chemicals.
  • Efficient extraction methods are crucial for realizing the potential of macroalgae as a renewable resource.
  • Current cell disruption and extraction techniques require improvement in rate and yield.

Purpose of the Study:

  • To investigate the use of hydrodynamic cavitation (HC) for intensifying the extraction of phycoerythrin, proteins, and carbohydrates from marine macroalgae (Palmaria palmata).
  • To evaluate the performance of vortex-based HC devices in enhancing extraction rate and yield.
  • To develop a model for interpreting and describing HC-assisted extraction data.

Main Methods:

  • Utilized vortex-based hydrodynamic cavitation (HC) devices without small restrictions or moving parts.
  • Established a bench-scale setup with a 20 LPM slurry flow rate using dried and powdered Palmaria palmata.
  • Measured the influence of pressure drop and number of passes on extraction performance.
  • Developed and applied a model to interpret experimental data.

Main Results:

  • Hydrodynamic cavitation (HC) significantly improved extraction rate and yield compared to stirred vessels.
  • HC achieved a 2 to 20 times improvement in the extraction rate of phycoerythrin (R-PE), proteins, and carbohydrates.
  • An optimal pressure drop was identified for maximum extraction performance.
  • A pressure drop of 200 kPa and approximately 100 passes were found to be most effective.

Conclusions:

  • Vortex-based hydrodynamic cavitation (HC) is an effective technology for intensifying the extraction of valuable products from macroalgae.
  • HC offers a substantial improvement in extraction efficiency over conventional methods.
  • The developed model and findings provide a basis for utilizing HC devices in industrial-scale macroalgae processing.