NOMADIC PROCESS FOR GENTLE EXTRACTION OF CONSTITUENTS OF GRAPE DANDRUFFS IN THE PHASE OF MACERATION IN RED VINIFICATION OR OF BREWING OF WHITE WINES BY BLOWING AT LOW PRESSURE OF CARBON GAS OR ROOM AIR

摘要

The invention relates to a nomadic process for extracting the most qualitative constituents: poly-phenolic compounds, tannins (flavonoids or proanthocyanidins) and anthocyanins as well as aromatic compounds, grape skins in the maceration phase in red wine making or red wine production. brewing white wines by blowing carbon dioxide or ambient air at low pressure under the cap of marc (3) supernatant in the grape juice (2) in a tank (1), the tank having an upper opening (14) at its upper part in communication with the atmosphere or not. According to the invention, the gases present in the space of the tank located above the layer of marc (3) are sucked in by a pumping device (4) by means of a side channel blower (5). the top of the tank and lower than the upper opening (14) and the gases sucked into the juice (2) are blown in the form of gas pulsations (15) stirring the grounds cap (3) from below and pushing back the juice (2) through it by crossing it to flood and submerge it. The gas rising in the top of the tank is sucked again to leave again under the marc cap (3) thus in a closed circuit. The side channel blower (5) of the pumping equipment (4) is a large closed impeller turbine operating at low pressure and high flow rate allowing the precise dosage of the flow rate and the air pressure necessary for the qualitative extraction. . An external adapted gas pumping apparatus (4) can be adapted to the process to complete the invention.