FIELD: food-processing industry. SUBSTANCE: method involves supplying basic material and liquid into upper chamber of apparatus; forcing air into upper chamber by piston; lowering piston downward for drawing liquid into lower chamber through rigid filter; disconnecting upper and lower chambers to remove basic material by scraping it from filter without removing filter. EFFECT: simplified method and construction of apparatus and improved quality of beverage. 49 cl, 17 dwg, 1 tbl
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