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Related Experiment Videos

Microalgae fractionation using steam explosion, dynamic and tangential cross-flow membrane filtration.

E Lorente1, M Hapońska2, E Clavero1

  • 1Catalonia Institute for Energy Research, IREC, Marcel·lí Domingo 2, 43007 Tarragona, Catalonia, Spain.

Bioresource Technology
|April 12, 2017
PubMed
Summary

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This study optimized microalgae processing using steam explosion and membrane filtration for lipid and sugar separation. Dynamic filtration with a 5000Da membrane proved most effective for efficient lipid recovery from Nannochloropsis gaditana.

Area of Science:

  • Biotechnology
  • Chemical Engineering
  • Algal Biomass Processing

Background:

  • Microalgae like Nannochloropsis gaditana are a promising source of lipids and sugars.
  • Efficient fractionation of these valuable compounds is crucial for sustainable biofuel and biochemical production.
  • Acid-catalyzed steam explosion offers a potential method for biomass disruption and component release.

Purpose of the Study:

  • To investigate the fractionation of acid-catalyzed steam-exploded Nannochloropsis gaditana biomass.
  • To evaluate the efficacy of membrane filtration and solvent extraction for separating lipids, sugars, and solids.
  • To compare different processing routes and membrane filtration techniques for optimal yield and efficiency.

Main Methods:

  • Acid-catalyzed steam explosion of Nannochloropsis gaditana.
Keywords:
Cell disruptionDynamic membrane filtrationFractionationMicroalgaeSteam explosion

Related Experiment Videos

  • Fractionation of exploded biomass using membrane filtration (conventional and dynamic) and solvent extraction.
  • Evaluation of two routes: 1) filtration followed by extraction, and 2) extraction followed by filtration.
  • Characterization of membrane performance, including permeability and lipid rejection.

    • Main Results:

    • Route 1 (filtration then extraction) significantly reduced solvent usage and improved lipid recovery yield.
    • Membrane filtration effectively separated the sugar-rich aqueous phase from the lipid-containing fraction.
    • Dynamic filtration demonstrated superior permeability (6 L/h/m²·bar) compared to tangential cross-flow filtration, especially with a 5000 Da membrane.
    • Complete lipid rejection was achieved during filtration.

    Conclusions:

    • Optimized processing of Nannochloropsis gaditana involves acid-catalyzed steam explosion followed by membrane filtration and solvent extraction.
    • Dynamic membrane filtration, particularly with a 5000 Da membrane, is highly effective for separating microalgal lipids and sugars.
    • This integrated approach enhances the efficiency and sustainability of microalgal biomass valorization.