A system, method and computer-readable medium for producing a pasteurized liquid product. The system comprises a first supply comprising a concentrate having a water content being less than that of the desired liquid product； a second supply of water and/or sugar solution； a first heat treatment device connected to the second supply and being arranged to heat the water or sugar solution to a predetermined temperature for reducing a number of microorganisms in the water or sugar solution； at least one combiner connecting the first supply with the heat treatment device, and configured to combine the heated water or sugar solution with the concentrate to form a liquid product, wherein the predetermined temperature of the water or sugar solution is set such as to reduce a number of microorganisms of the liquid product by the heat energy of the heated water and/or sugar solution.
