Process for producing starch sugar

Abstract

The invention discloses a process for producing starch sugar. The process comprises the following steps of: pulp-conditioning edible starch; liquefying; passing liquefied starch through a primary floating clarifier, guiding an upper floating sugar dreg liquid into a primary buffer tank, and then entering a primary disc-type centrifuge to be centrifugated and separated so as to extract sugar dregs; combining a clear sugar liquid flowing out of the primary disc-type centrifuge and a clear sugar liquid flowing out of the primary floating clarifier and flowing into a saccharifying tank to be saccharified into a saccharified liquid; passing the saccharified liquid through a secondary floating clarifier, guiding an upper floating sugar dreg liquid into a secondary buffer tank, and then enteringa secondary disc-type centrifuge to be separated so as to extract sugar dregs; combining a clear sugar liquid flowing out of the secondary disc-type centrifuge and a clear sugar liquid flowing out ofthe secondary floating scum clearing device and filtering by passing through a membrane micro-filtration system; and flowing a micro-filtered concentrated liquid containing dregs back to the secondary buffer tank, entering a micro-filtered clear sugar liquid into an ion exchange system to be decolorized and desalted, and then finally concentrating into a product. According to the process for producing the starch sugar disclosed by the invention, filter aids and activated carbon are not required in the clarification and the filtration processes, and high-purity sugar liquid can be obtained through the efficient operation of solid-liquid separation equipment; and meanwhile, sugar dregs without the filter aids and the activated carbon are extracted and can be used as a feedstuff raw materialfor animals, thereby changing waste into valuable, and no discharge of filtered solid wastes during the whole process exists.

Description

technical field [0001] The invention relates to a starch sugar production process, in particular to a starch sugar production process in which filter aid and activated carbon are not required to be added during the clarification process of starch sugar liquid, and sugar residue without filter aid or activated carbon is simultaneously obtained. Background technique [0002] Starch sugar is more and more widely used in various fields. As a bee feed and fermentation carbon source, especially in the food industry such as beverages, candies, cakes, beer, chewing gum, soy sauce, etc., it has obvious advantages over other sweeteners. With the improvement of people's consumption concept and consumption level, the demand for starch sugar continues to increase, and the improvement of the production capacity and product quality of starch sugar is particularly important. [0003] The clarification, filtration and decolorization of starch sugar is one of the key steps in the production ...

AI Technical Summary

Problems solved by technology

The traditional production process of starch sugar is liquefaction, saccharification, decolorization, plate-and-frame filter press or vacuum drum filter filtration, ion exchange, and concentration. During the saccharification process, a large amount of sugar residue containing impurities such as protein and fat exists, which affects the glucoamylase. effect, and the decomposition of miscellaneous enzymes contained in the enzyme preparation produces by-products and pigments, which increases the color of the saccharification solution and the difficulty of refining; and because there are a large amount of impurities such as protein and fat, diatomaceous earth or perlite must be used Only filter aids and activated carbon can decolorize and filter the sugar liquid smoothly. Sugar residues containing filter aids or activated carbon cannot be used as raw materials for animal feed, and can only be discharged as solid waste, which is not environmentally friendly; plate and frame filter press and vacuum transfer Traditional starch sugar filtration equipment such as drum filter is intermittently produced, and there is a large amount of solid waste and sewage from cleaning equipment, and the production environment is relatively poor.

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