Prawn feed immune polysaccharide

Abstract

An immunopolyose feed for prawn is prepared from the discarded yeast mud generated during brewing beer through high-pressure (200-600 MPa) shock-pulverizing for homogenizing 1-4 times, adding table salt and edible alcohol, enzymolyzing at 45-60 deg.C, pressure-filtering, superfine breaking of filtered dregs in liquid, pressure filtering again, acidifying and keeping temp. in an intermediate tank, and spray-drying. Its advnatages are low cost and high effect on improving the resistance of prawn to disease.

Description

technical field [0001] The invention relates to a prawn feed immune polysaccharide, in particular to a prawn feed immune polysaccharide containing β-1,3-glucan. Background technique [0002] The yeast cell wall is mainly composed of the following components: alkali-insoluble β-1,3-glucan, alkali-soluble β-1,3-glucan (glucan branch chain with β-1,6 bonds) , Acid-soluble β-1,6-glucan (glucan branched chain with β-1,3 bonds), alkali-soluble mannan combined with protein, etc. Among them, β-1,3-glucan has an immunostimulatory effect, and its sources include: Saccharomyces cerevisiae, Kluyveromyces fragilis, Candida, fungi, unicellular algae, etc. Alkali-insoluble β-1,3-glucan has the strongest effect. In addition to human beings, aquatic animal immunology studies have confirmed that it is effective for certain artificially farmed fish (such as: Atlantic salmon, catfish, rainbow trout and giant flounder) and Prawns (Penaeus monodon, Penaeus vannamei, and Penaeus sinensis) have s...

AI Technical Summary

Problems solved by technology

The β-1,3-glucan obtained by the above method is developed into prawn feed immune polysaccharide feed additive, which mainly has the following defects: (1) high investment, requiring a large amount of special equipment; (2) high production cost: organic solvent extraction method The cost of the organic solvent used in the method is high, it takes a lot of energy to wash the acid and alkali in the alkali-acid method, and it needs to react at high temperature, the energy consumption is large, and the enzymatic extraction needs to add a large amount of enzyme preparation with higher price; (3) organic solvent The method and the alkali-acid method are not environmentally friendly, will also produce toxicity, and have a certain degree of corrosion; (4) It is known that the molecular weight of β-1,3-glucan with the best immune effect can be 100,000 Daltons, However, the use of dextranase in the existing enzymatic extraction method cannot ensure that the product has the molecular weight to exert the best performance

[0004] At present, the quality and scientific and technological content of prawn feed are still lagging behind. Disease control is still the primary problem in the process of prawn farming. There are also common problems such as the abuse of antibiotics, hormones, and even the use of some carcinogenic and mutagenic chemical compounds for the purpose of curing diseases and promoting growth. other real problems

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