A kind of kelp-degrading bacteria and its method for preparing kelp juice

Abstract

The invention provides a kelp-degrading bacterial strain with kelp-degrading activity. The strain has been preserved in the General Microorganism Center of China Committee for Culture Collection of Microorganisms, named Tamlana alginolytica, and the preservation number is CGMCC No. 5324. The provided bacterial strain can produce an extracellular complex enzyme system with various polysaccharide degrading activities, and can realize deep degradation of kelp. The present invention provides two kinds of kelp juice production processes that do not need to add leaching medium and do not need heating and heat preservation assistance, that is, the bacterial treatment process using kelp block as raw material and the enzyme treatment process using kelp powder as raw material, both of which can be used in Under mild conditions, the laminarin is degraded into reducing oligosaccharides or monosaccharides through biodegradation, and at the same time achieves the effect of deodorization. The invention improves the comprehensive utilization rate and edible quality of raw materials, provides technical support for the deep processing of kelp, and has great application prospects in the development of kelp drinks.

Description

technical field [0001] The invention belongs to the technical field of environmental microorganisms, in particular to a strain of marine bacteria Tamlana alginolytica ZJU HZ22, strain preservation number is CGMCC No. 5324, and its application in biological preparation of kelp juice. Background technique [0002] Kelp farming is a characteristic mariculture industry in the Northwest Pacific Ocean, mainly including China, Japan, South Korea and other countries. At present, the annual output of kelp in my country has reached more than 800,000 tons (dry weight), ranking first in the world. The scale of farming is only about 200,000 to 100,000 tons (dry weight) per year. However, compared with the advantages in breeding, the processing level of kelp in my country is far behind that of Japan and South Korea. The main performances are: 1. The comprehensive utilization rate of raw materials is low. At present, the comprehensive utilization rate of kelp in my country is still less t...

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Problems solved by technology

However, compared with the advantages in breeding, the processing level of kelp in my country is far behind that of Japan and South Korea. The main performances are: 1. The comprehensive utilization rate of raw materials is low. At present, the comprehensive utilization rate of kelp in my country is still less than 30%. 2 / 3 of the active ingredients of kelp have not been developed, and in Japan and South Korea, where kelp processing technology is developed, the comprehensive utilization rate of kelp has reached more than 80%; 2. The variety of shaped products is single and the technical content is low. There are only dozens of types, and they are basically limited to primary processed products such as kelp knots and kelp shreds. In Japan, more than 130 series and more than 300 varieties of kelp food and health products have been formed.

In 2007, Hu Zhihe and others studied and reported the method of enzymatic hydrolysis to prepare kelp juice, that is, the kelp powder was processed by adding cellulase, pectinase and papain, and then extracted with water to obtain kelp juice. It is the first and only report in China to use enzymatic hydrolysis technology to prepare kelp juice, but it did not enzymatically treat the alginate with the highest content in kelp. The important reason is that there are very few alginate lyase preparations on the market. extremely expensive

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