Pomegranate wine is a fruit wine made from pomegranate as the main raw material, which is crushed, fermented, separated and aged. Pomegranate wine is pure, bright and transparent, sweet and sour, retaining the natural flavor of pomegranate, such as acid, sweet, glutinous and fresh, and contains a large number of amino acids, multivitamins, phenolol, etc., with high nutritional value. And there are Shengjin food, spleen and stomach, blood pressure and lipid-lowering, softening blood vessels and other effects. However, in the process of processing, storage and sale, since the unclarified fruit wine contains pulp and some macromolecules such as protein, pectin and polyphenols, its long-term coexistence is prone to turbidity. Normal fruit wine, even if it has slight loss of light, is considered to be a poor quality or even deteriorated performance, and the wine is prone to turbidity during brewing and storage, which greatly affects the appearance and quality of the wine.
At present, a lot of research has been done on fruit wine at home and abroad. Gelatin, bentonite, egg white, bentonite, chitosan and pectinase are commonly used clarifying agents. However, for different wine types, the ratio of clarifying agent and the amount of addition will have different clarifying effects. For example, He Zeng and other studies have shown that pectinase is the most ideal clarifying agent for the least amount of self-brewed Jufeng wine and the shortest clarification time; Liu Ruiping et al. proposed that bentonite is a good clarification agent for alcohol abuse. The effect can better preserve the polysaccharides of cockroaches; Luo Aixiang and others have proved that when clarification effect of gelatin and chitosan on persimmon wine is better than that of single use, the maximum amount of protein and tannin in wine is separated. Therefore, in order to obtain clear and transparent and long-term storage of pomegranate wine which does not produce biological turbidity, this experiment uses pomegranate as a clarified wine sample, and analyzes gelatin, bentonite, chitosan and fruit by single factor and orthogonal test. The clarifying effect of four kinds of clarifying agents of pectin on pomegranate wine provides reference for the development and utilization of pomegranate wine products.
