Method for producing tangerine peel low methoxy group pectin by using pectinase

Abstract

The invention discloses a method for producing low-methoxy pectin of orange peel with the pectinase, which includes the following procedures that: the dried orange peel is shattered into granules, soaked with water to be softened, then undergoes enzyme inactivation, condensation and circumfluence, centrifuge, and spin drying, to obtain the powder of the orange peel, which is hydrolyzed by pectinase and centrifuged to obtain the extract of the pectin, which undergoes decolorating filtration to obtain the pectin filtrate, which is degreased and transformed with concentrated hydrochloric acid, filtered, rinsed and then filtered to obtain the filtered cake, which is shattered and dried to obtain the product of low-methoxy pectin. The method provided by the invention for producing the low-methoxy pectin has high extraction efficiency, low energy consumption, low environmental pollution, simple operation of the extraction, high productive efficiency and high quality of the product.

Description

technical field [0001] The invention relates to a method for preparing low-methoxyl pectin, in particular to a method for preparing citrus peel low-methoxyl pectin by using a biological enzyme preparation. Background technique [0002] Citrus is the fruit with the largest output in the world and the third largest agricultural product in international trade. In 2006, the world's annual output of citrus reached more than 120 million tons, accounting for about one-fifth of the world's annual fruit output; among them, my country's citrus output exceeded 16 million tons, ranking second in the world, and its planting area ranked first in the world. Whether citrus is eaten fresh or processed, the peel is its main by-product, accounting for about 20% to 40% of the fruit weight, and the pectin content in the peel is 20% to 30%, which is an important source of commercial low-methoxyl pectin. raw material. At present, except for a few people in China who use citrus peels for traditio...

AI Technical Summary

Problems solved by technology

Although there are many methods, they all have disadvantages such as high energy consumption, high pollution, unstable product quality, and long production cycle to varying degrees.

Taking the acid and alkali methods as an example, there are still defects such as difficult separation of residues, easy corrosion of equipment, high energy consumption, and a large amount of acid-base waste generated is likely to pollute the environment; and the shortcomings of the amidation method are also reflected in the amidation The effect will bring some harmful substances to the human body