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AssigneeCommissariat a l'Energie Atomique
InventorsHenri Barnier, Patrick F. Ferreira Dos Santos, Claude Gudin, Catherine Thepenier
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Process for the production and extraction of polysaccharides from a porphyridium cruentum culture and apparatus for performing the process. This production and extraction process comprises a stage of concentrating the polysaccharides consisting of leaving the culture medium (1) in a photoreactor (22) exposed to sunlight under stagnant conditions and at ambient temperature, leading to the formation of a polysaccharide-rich cream (23) and recovering said cream by skimming, a stage (24) of heating the concentrate obtained at a temperature between 60.degree. and 100.degree. C., a stage of separating the solid and liquid phases formed (26), a stage (30) of precipitating the polysaccharides contained in the liquid phase and a stage (16) of drying the precipitate obtained.
Process for producing and extracting polysaccharides from a culture of the microalga porphyridium cruentum comprising the steps of concentrating pericellular and exocellular polysaccharides produced by the microalga, heating the microalga to a temperature in the range of from 60.degree. to 100.degree. C., separating solid and liquid phases present for recycling microalga in the solid phase without a prior basification or neutralization step for recovery of intracellular polysaccharides, precipitating the polysaccharides present in the liquid phase, and drying the resulting precipitate.
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