Method for destroying harmful micro-organisms in liquids by short-time high-temperature heating

A method of killing harmful microorganisms in liquids by brief high heating, z. B. through pasteurisation of liquid food such as milk or other liquids, in which the liquid in the first step or by a micro heat exchanger with up to about 10000 microchannels per cm x 3 · heat exchanger volume in an extremely short time interval with a gradient of at least 200 DEG K / is heated sec, held in the second step in a time interval of <2 sec at this temperature and in a third step turn into or through a micro-heat exchanger of the same type in a extremely short time interval with a gradient of at least 200 ° K / sec is cooled down again.