FIELD: food industry.
SUBSTANCE: invention relates to food industry and to technique of pectin extraction from wastes remained after industrial treatment of watermelons. Method provides for cleaning in water, crushing and further hydrodynamic cavitation, US treatment at 300-400 HZ frequency and acid hydrolysis at pH 5.0-6.0 and 68-72°C of temperature during 50-70 minutes. Produced extract is separated. Then pectin-containing extract is exposed to ultra-filtration treatment. Pectin substances precipitate due to calcium chloride and they are cleaned by ethyl alcohol.
EFFECT: increase of pectin yield, improvement of pectin quality.
1 dwg, 1 tbl, 3 ex
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