Case Study

POLARDRY® FOR MICROALGAE PROCESSING

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Readying Microalgae for Commercial Use Requires Drying

Drying harvested microalgae is time-consuming and more difficult than agricultural crop dehydration. The long drying time results in large drying costs. Microalgae can be easily degraded by high temperatures during manufacturing. It also has low storage stability and can undergo oxidative degradation triggered by light, temperature, and/or extreme pH in the presence of oxygen.

The patented PolarDry technology, which employs an electrostatic
charge in the spraying process, is optimal for sensitive products
such as microalgae.

  • With a feedstock based on a polar solvent, the solid materials
    (microalgae) are driven to the inside of the droplet, and the
    solvent (water) is driven to the outside, lowering the required
    evaporation temperature.
  • The active ingredients (pigments) are protected by the formation
    of a thin layer of solvent on the surface of the particles during
    the drying.
  • PolarDry uses nitrogen as the drying gas. Together with the
    lower temperature, denaturation and oxidation of the products
    are minimized.
  • Superior protection increases potency, stability and product
    shelf life while providing superior dissolution.

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