Comprehensive utilization method of abodominal organs of grass carp

Abstract

The invention relates to a comprehensive utilization method for grass carp harslet, which belongs to the technical field of aquatic product processing. The method mainly comprises the following steps: the grass carp harslet is washed to be clean, subjected to deordorization treatment by mixed solution of acetic acid, sodium chloride and sodium sulfite, smashed, subjected to trypsin enzymolysis and centrifugation, and separated to obtain upper coarse fish oil; refined fish oil can be prepared by refining coarse fish oil; and lower enzymatic hydrolysate is subjected to vacuum filtration, secondary debitterizing and deordorization by active carbon, and spray drying to obtain fish protein polypeptide powder and amino acid powder, wherein the polypeptide powder mainly contains dipeptide and tripeptide, is rich in a plurality of mineral elements, is easy to be digested and absorbed by the intestinal tract, and is high-quality nutriment; and the amino acid powder contains complete varieties of amino acid, and can be an additive of various amino acid nutrition-enriching products. The comprehensive utilization method has mild technological conditions, has extraction efficiency as high as 90 to 95 percent, fully utilizes harslet waste during processing grass carp, changes waste into valuable, and greatly improves economic benefit.

Description

technical field [0001] The invention discloses a comprehensive utilization method of grass carp viscera, which belongs to the technical field of aquatic product processing. Involves efficient use of processing by-products. Background technique [0002] Freshwater fish is an important aquatic resource in my country. With the development of freshwater aquaculture in recent years, the production of freshwater fish products has increased rapidly, resulting in a large amount of leftovers. These leftovers are often used as waste or processed into feed with low economic value. The level of comprehensive utilization of freshwater fish. Grass carp viscera is the main by-product of grass carp processing, accounting for about 10% of the whole grass carp weight. Making full use of it can increase the added value of grass carp processing and obtain good economic benefits. [0003] The content of crude fat in grass carp viscera is 30% to 55%, of which saturated fatty acid is 21.5%, mono...

AI Technical Summary

Problems solved by technology

The cooking method cannot separate the fat combined with protein, so the extraction rate is relatively low, and the extraction temperature is generally around 90°C, which affects the quality of the extracted fat

After the oil is extracted by light alkali hydrolysis, other nutrients cannot be further efficiently utilized, resulting in a lot of waste

The extraction rate of the expresion method is lower and the fish oil produced is of lower quality

The solvent method consumes a large amount of organic solvent, and the solvent is easy to remain in the product, so few manufacturers use it