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Method for preparing phagostimulant by using krill for aquiculture animals

A technology of aquaculture and food attractant, which is applied in application, fish farming, climate change adaptation, etc. It can solve the problems of low nutrient level bait utilization rate and low animal food intake, so as to shorten the feeding time of animals and enrich the nutrition , The effect of improving the water quality cleaning rate

Inactive Publication Date: 2004-06-09
OCEAN UNIV OF CHINA
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AI Technical Summary

Problems solved by technology

However, considering the use value of this method, the raw materials used and the obtained extract, there are still many shortcomings, such as the animal's food intake is low, the nutritional level and the utilization rate of the bait are not high

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0006] After thawing 100 kg of frozen krill, crush it mechanically, place it in a 500-liter stainless steel reactor, heat up to 45°C, dissolve itself for 5 hours, add 2 kg of 50% NaOH, then continue to heat up to 105°C, and hydrolyze for 2 hours. The solid and liquid are separated, the obtained liquid is krill protein liquid, and the obtained solid is krill shell. The latter was added with 45% NaOH, deacetylated in a reaction kettle at 110°C for 3 hours, and the solid and liquid were separated. The solid is chitosan, and the lye is separated for next use. The above-mentioned krill protein solution is adjusted to pH 6.3, and flocculation particles appear; 50Kg chitosan colloid solution (2% chitosan is dissolved in 2% hydrochloric acid solution) is mixed with 100Kg krill protein solution, and flocculated for more than 6 hours. The precipitate and supernatant were separated. The precipitate was concentrated in vacuo to obtain a paste and dried to obtain a powder.

[0007] The ...

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PUM

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Abstract

The present invention relates to a method for preparing phagostimulant for aquaculture animals by utilizing euphausiid, and said method includes the following steps: pulverizing euphausiid, heating, self-dissolving, adding alkali, continuously ehating to make hydrolysis, solid-liquid separation, the obtained liquid is euphausiid protein solution, adding alkali intothe obtained solid euphausiid shell to make deacetylation, separating out solid chitosan, acid-dissolving chitosan to obtain chitosan colloid solution, mixing the chitosan colloid solution and the above-mentioned euphausiid protein solution, after flocculation separating precipitate and vacuum drying so as to obtain the invented product which can raise food intake of animal, raise utilization rate of bait and raise the nutrient level of bait.

Description

technical field [0001] The invention relates to a non-nutritional additive for aquaculture bait, in particular to a method for preparing a food attractant for aquaculture animals by using krill. Background technique [0002] Fish and shrimp feed additives are divided into nutritional additives and non-nutritive additives. Non-nutritional additives refer to additives added to feed that promote growth and development, improve feed structure, maintain feed quality, help digestion and absorption, and prevent and control diseases, such as growth promoters, food attractants, adhesives, antifungal agents and Colorants, etc., these substances are conducive to improving the utilization of feed ingredients. Fish and shrimp food attractants refer to a class of substances that can attract fish and shrimp to food and stimulate appetite to promote food intake. Aquatic animals often eat artificial compound bait. Although this bait has comprehensive nutritional components, it loses the fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 姜国良刘云杨栋李立德
Owner OCEAN UNIV OF CHINA
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