High-efficiency energy-saving processing method of sweet potato juice

Abstract

The invention relates to a high-efficiency energy-saving processing method of a sweet potato juice, which comprises the following steps: peeling the raw material sweet potatoes, crushing, heating, and gelatinizing to obtain a sweet potato pulp, carrying out high-temperature enzymolysis on the sweet potato pulp, pressing the sweet potato pulp to obtain a sweet potato juice and peel trimmings, and carrying out after-treatment on the sweet potato juice to obtain the sweet potato juice finished product. The method is characterized in that the sweet potatoes are crushed and extruded, the extruded sweet potatoes are heated and gelatinized, and the extruded sweet potato juice is used as spray water in the pressing process; and wood fibers is mixed and added in the sweet potato pulp pressing process. According to the method, the sweet potatoes are directly extruded after being crushed, and the extruded sweet potato juice is used as spray water for gelatinization, so that no water is additionally added, thereby saving the time and energy consumption; and meanwhile, the wood fibers, which have smooth surface and have not burrs, are added in the sweet potato pressing process and can fully display the filtration action in the pressing process, so that the juice in the sweet potato trimmings can be sufficiently extruded, thereby enhancing the juice yield of the sweet potato trimmings.

Description

technical field [0001] The invention belongs to the field of fruit juice pressing methods, in particular to a high-efficiency and energy-saving processing method of sweet potato juice. Background technique [0002] The production process of conventional hot-pressed sweet potato juice is: use fresh sweet potatoes as raw materials, form a slurry through peeling, crushing, high-temperature gelatinization, etc., and then obtain potato pulp through pressing, saccharification, etc., and then obtain finished potato juice through filtration and other processes. juice. When sweet potatoes are pressed, the skin dregs will be separated. Generally, the skin dregs content is as high as 40% to 55%. Among them, because they contain a certain amount of impurities such as starch, pectin, and pigments, they are usually only used as fertilizers in the prior art, and some of them have been processed. It is used as feed, and the active ingredients are not fully utilized. [0003] The current s...

AI Technical Summary

Problems solved by technology

[0003] The current squeezed sweet potato juice is the sweet potato juice produced after the sweet potato is squeezed once. The sugar content range of the sweet potato juice is relatively fixed. If the sugar content is increased, generally the existing sweet potato juice can only be used to achieve the purpose of increasing the sugar content, but this cannot be solved fundamentally. The problem of increasing the sugar content of sweet potato juice needs to innovate the existing production method

[0004] After searching, the methods involved in the existing patents have not improved how to improve the sugar content of sweet potato juice. The existing methods mainly involve the production of sweet potato juice with high fiber and high protein content. The purpose of this patent is different, the means are different, and the effect obtained is different.

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