Fremgangsmåde til sterilisering af en installation til behandling af fødevareprodukter

1338656 Washing; sterilizing; packaging &c equipment E P REMY ET CIE 15 June 1971 [29 July 1970] 28028/71 Heading F2N [Also in Division A5] Product-dispensing plant, e.g. for the conditioning or packaging of milk, is sterilized by circulating through the plant a sterilizing fluid at a temperature higher than 100‹ C., e.g. between 120‹ and 130‹ C., and lower than the boiling point of the fluid at ambient atmospheric pressure, the fluid including a polyalcohol miscible with water. The fluid may be introduced into the plant in the liquid and/or vapour phase. The fluid may be a mixture of water and diethylene glycol, triethylene glycol, propylene glycol or glycerol. Before circulating the sterilizing fluid, the plant may be washed with water, cleaned with an alkaline or acid solution, washed with water at 70‹ C. and then heated with water at 80 or 90‹ C. After circulating the sterilizing fluid, the plant may be cooled by a mixture of diethylene glycol and water at 90‹ C., washed with water and water vapour and finally cooled by water and a sterilized gas, e.g. air or nitrogen.