Comprehensive utilization method of abodominal organs of grass carp
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A technology for viscera and grass carp, applied in the field of aquatic product processing, can solve the problems of efficient utilization, separation, affecting the quality of extracted fat, etc., and achieve the effects of improving flavor, mild conditions, and increasing utilization value
Inactive Publication Date: 2009-05-20
JIANGNAN UNIV +1
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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
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Embodiment 1
[0017] Example 1: Process for simultaneously producing crude fish oil and polypeptide powder using grass carp viscera
[0018] Take 50kg of fresh viscera from grass carp processing that has been cleaned of intestinal digesta, rinse with clean water, soak in a mixture of 0.05% acetic acid + 0.1% sodium chloride + 0.05% sodium sulfite for 1 hour, rinse with clean water for 10 minutes, and then rinse with running water Go to the mixture. Use a tissue masher to mash the viscera, add 50kg of water, adjust the pH to 8, heat to 40°C, add 750g of trypsin, mix well, keep warm for 4 hours, and stir once every 20 minutes. After enzymolysis, centrifuge in a centrifuge at 4500r / min for 5min while hot, and separate the crude fish oil in the upper layer. The remaining enzymolyzed protein solution was filtered with a vacuum filter, the obtained hydrolyzed solution was heated to 40°C, 500g of activated carbon was added and stirred thoroughly, adsorbed for 40min, and the activated carbon was r...
Embodiment 2
[0019] Example 2: Process for simultaneously producing refined fish oil and amino acid powder using grass carp viscera
[0020] Take 50kg of fresh viscera from grass carp processing that has been cleaned of intestinal digesta, rinse with clean water, soak in a mixture of 0.05% acetic acid + 0.1% sodium chloride + 0.05% sodium sulfite for 1.5 hours, rinse with clean water for 20 minutes, and then rinse with running water Go to the mixture. Use a tissue masher to mash the viscera, add 50kg of water, adjust the pH to 8, heat to 40°C, add 1000g of trypsin, stir well, keep warm for 6 hours, and stir once every 20 minutes. After enzymolysis, centrifuge in a centrifuge at 4500r / min for 8min while hot, and separate the crude fish oil in the upper layer. Crude fish oil is degummed by phosphoric acid, deacidified by alkali refining, decolorized by adsorption, and deodorized by vacuum to obtain refined fish oil with good quality.
[0021] The remaining enzymolyzed solution was filtered...
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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...
Claims
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