The invention relates to a preparing technology of high-quality apple jam. Smashing pulping and steam
enzyme deactivation are integrated, and ultrafast cooling is carried out immediately after pulping and
enzyme deactivation, wherein ultrafast cooling is achieved in the mode that
vacuum cooling and frozen
saline water conducting cooling are coupled; in the whole technological process, parameters are strictly controlled, the quality of fruit raw materials is protected to the maximum degree, the heat action temperature is reduced, the heat action time is shortened, the
enzyme deactivation effect is quite good, and the original luster, the original
flavor and the original nutrients of apples are kept. The preparing technology includes the following steps of apple
raw material quality control,
coupling of smashing pulping and steam enzyme deactivation, ultrafast cooling, filtering separation, multi-effect low-temperature concentration, mixing, filling, sterilizing and rapid cooling. By means of the preparing technology, enzymatic
browning of
polyphenol oxidase is greatly eliminated, losses of
nutrient ingredients such as
sugar,
protein, mineral substances and vitamins in apples are also effectively avoided, the high-quality apple jam quite good in color,
aroma and taste is obtained accordingly, and quite-large market popularization value is achieved.