Continuous pasteurization is usually performed in a high temperature short time (HTST) heat exchanger following blending of ingredients in a large,insulated feed tank. Some preheating, to 30 to 40 C,is necessary to dissolve the components. The HTST system is equipped with a heating section, a cooling section, and a regeneration section. Due to the preheating of the mix,regeneration is lost and the mix entering the cooling ststem is still quite warm