Method for preparing pig skin gelatin through rapid freeze thawing

Abstract

The invention discloses a method for preparing pig skin gelatin through rapid freeze thawing. The method comprises the steps of pig skin pretreating, liquid nitrogen rapid freezing treating, acid unfreezing treating, gelatin extracting and centrifugal drying. According to the established method, the high-quality pig skin gelatin is produced by combining liquid nitrogen rapid freezing with acid unfreezing, the technology has the advantage that a novel gelatin extracting method is developed, a pig skin raw material is unfrozen with acid after liquid nitrogen rapid freezing is adopted, that is to say, after liquid nitrogen rapid freezing is conducted, the pig skin raw material is treated only for 10 min with HCl and then washed to be clean with deionized water, and gelatin extracting can be conducted with hot water. Compared with a traditional acidic method technology, the acid treatment time is greatly shortened. The pig skin gelatin produced through the method has the advantages that the gelatin yield reaches up to 82.95%, and the physical and chemical properties both meet the standard of the GB 6783-2013 'food additive gelatin', and therefore it is illustrated that the rapid freeze thawing method is reasonable and feasible.

Description

technical field [0001] The invention belongs to the field of food processing, and in particular relates to a method for preparing pigskin gelatin by rapid freezing and thawing. Background technique [0002] The raw materials for the production of gelatin can only meet the requirements of gelatin extraction after pretreatment and gelatinization. The role of gelatinization of collagen is to destroy the non-covalent bonds and covalent cross-links that maintain and stabilize the advanced structure of collagen, loosen the triple helical structure of collagen, and destroy the non-helical crystallization region, so as to facilitate the release of subunit molecules during the gel extraction process; follow-up The gel extraction process is to further destroy non-covalent bonds such as hydrogen bonds and some covalent bonds through heat treatment, so that the collagen triple helix structure is disintegrated, the subunit molecules are fully dispersed into the solution, and then dried t...

AI Technical Summary

Problems solved by technology

However, this process requires multi-step separation and extraction, the steps are cumbersome, and biological enzymes are used as consumables, so the production cost is too high

[0004] In view of the current situation of low production efficiency and serious acid-base pollution in the gelatin production process, and considering that the gelatin market in the world is still dominated by mammalian gelatin, it is necessary to study a new gelatin extraction method