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FOAM FRACTIONATION

Definition

A water treatment method widely used in aquaculture to improve the water quality of the culture systems (e.g. fish tanks). Colloids and solid particles (for example, broken food pellets and particles of debris) are removed from the installation as foam that can be skimmed from the water surface. Foaming is brought about by increasing the air-water interface through strong aeration. The overflowing foam, after collapse, is called the foamate. The term "protein skimming" is incorrectly used for foam fractionation but has been introduced, and is extensively used, in the literature of the petfish industry and the brochures of the aquaculture supply industry, despite the fact that much more than the proteins are skimmed.

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