Process for dehydration of berries

A - Human Necessities – 23 – L

Patent

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A23L 1/212 (2006.01) A23B 7/02 (2006.01) A23B 9/04 (2006.01) A23B 9/20 (2006.01) A23L 1/00 (2006.01) A23L 3/40 (2006.01) A23L 3/54 (2006.01)

Patent

CA 2354300

A process for drying antioxidant-rich berries (such as blueberries) to preserve their antioxidant action and their antioxidant compounds is disclosed. The process may conventionally dry the antioxidant-rich berries to remove 0 to 90 % of the initial mass of water associated with them, but the important step is subjecting the antioxidant- rich berries to vacuum microwave drying (VMD) at an absolute pressure of 0 to 200 millimeters of mercury (mm Hg) (preferably 30 to 60 mm Hg) and 0.1 to 2 watts of microwave power/gram of berries (preferably 0.5 to 1 watt/gram) to reduce the moisture content to a residual moisture content of less than 35% of the dry weight of the final dry product

Un procédé de séchage de baies riches en antioxydant (comme les bleuets) pour préserver leur propriété anti-oxydante et leurs composants antioxydants est divulgué. Le procédé peut sécher conventionnellement les baies riches en antioxydants pour enlever entre 0 et 90 % de la masse d'eau qui leur est généralement associée, mais l'étape importante consiste à soumettre les baies riches en antioxydants à un séchage micro-ondes sous vide, à une pression absolue de 0 à 200 millimètres de mercure (mm HG) (de préférence entre 30 et 60 mm HG) et une puissance de micro-ondes de 0,1 à 2 watts par gramme de baies (de préférence entre 0,5 et 1 watt/gramme) pour réduire la teneur en eau à une teneur en eau résiduelle de moins de 35 % du poids sec du produit final séché.

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