Sulphur-free clarifying decolorization method for sugar-cane squeezed juice

Abstract

The invention relates to a sulphur-free clarifying decolorization method for sugar-cane squeezed juice. The method comprises the steps: squeezing sugar canes so as to obtain initial squeezed juice, performing preliming by using alkaline kaolin, adjusting the pH value to a required condition under stirring, then adding an appropriate amount of hydrogen peroxide and vitamin C-modified bentonite sequentially, performing stirring for a certain period of time so as to achieve complete oxidative decolorization and adsorption, performing filtration on the sugar cane juice mixture so as to obtain a filtrate which is clear sugar-cane juice, performing an evaporation concentration process, performing secondary decolorization further on the concentrated juice obtained after evaporation concentrationby using a H2O2-VC composite decolorizer, and finally performing crystallization separation so as to obtain a finished product white sugar, wherein the filter cake is bentonite rich in organic matter,is sent into an organic fertilizer workshop, and is applied to preparation of organic fertilizer. Through the process, clarification and decolorization of the sugar cane juice can be achieved at a low temperature, adverse defects of a traditional high-temperature clarification method can be overcome, byproducts are few, energy consumption is low, no sulfur matter is used in the process, the clarification effect is reduced, and the clarification cost is reduced; and adopted additives are natural mineral-modified composites, and are natural and non-toxic.

Description

Technical field [0001] The invention relates to a method for sulfur-free clarification and decolorization of pressed sugarcane juice, belonging to the field of clarification and decolorization of sugar juice. Background technique [0002] Sugarcane juice (referred to as sugarcane juice) is obtained after the sugarcane is pressed and extracted. It is a typical colloidal solution composed of multiple components, and its composition and properties are very complex. In addition to sucrose, cane juice also contains reducing sugars, various polysaccharides, proteins, various amino acids and amides, organic acids, pectins and other colloids, sucrose fat and wax, various pigments, and mixed cane chips and mud Mo etc. The traditional sugarcane sugar production process includes juice extraction, clarification, evaporation, crystallization, honey separation and drying. The clarification process is the most critical link in the sugar process, and its purpose is to remove the colloids and p...

AI Technical Summary

Problems solved by technology

However, this method lacks the adsorption function, the colored substance molecules cannot be removed by adsorption, the decolorization method is single, and the vitamin C used in the compound decolorizing agent is expensive, and a large amount of use will cause high decolorization costs

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