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Method for extracting fish oil from fish heads and fish skin

A fish skin and fish head technology is applied in the production of fat oil/fat, fat production, etc., which can solve the problems of unstable water content of fish meal, environmental pollution, and poor utilization of waste by-products, etc., to improve the purity of fish oil and the extraction effect. Good results

Inactive Publication Date: 2014-03-05
WEIHAI YUWANG GRP MARINE BIOLOGICAL ENGCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the fishery processing in our country is still relatively simple, and some discarded by-products of fishery processing are not well utilized, causing environmental pollution and waste of resources. For example, the inedible part of aquatic products is processed into fish meal by a simple method, but this The moisture content of fishmeal is unstable, easy to oxidize, and has a short shelf life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A method for extracting fish oil from fish heads and fish skins, comprising the following steps:

[0013] (1) Raw materials are crushed. Freeze the cleaned fish head and fish skin at -25°C for 16 hours, add 1 / 20 of the weight of the raw materials in water, grind them, and then put them into a homogenizer to homogenize to obtain a homogenate;

[0014] (2) Enzymatic hydrolysis, put the homogenate into a constant temperature pot, add water 8 times the weight of the homogenate, control the temperature at 45°C, add neutral protein, react for 12 hours and concentrate;

[0015] (3) Organic solvent extraction, the enzymatic hydrolysis product was dried, added cyclohexane 10 times its weight, and centrifuged, extracted 3 times, and the cyclohexane layer was collected and combined;

[0016] (4) Concentration and purification, concentrating and recovering the organic solvent to obtain crude fish oil, washing the crude fish oil with 10% sodium chlorate solution for 1-2 times to obt...

Embodiment 2

[0018] A method for extracting fish oil from fish heads and fish skins, comprising the following steps:

[0019] (1) Raw materials are crushed. Freeze the cleaned fish head and fish skin at -20°C for 20 hours, add 1 / 30 of the weight of the raw materials in water, grind them, and then put them into a homogenizer to obtain a homogenate;

[0020] (2) For enzymatic hydrolysis, put the homogenate into a constant temperature pot, add water 5 times the weight of the homogenate, control the temperature at 50°C, add neutral protein, and react for 10 hours;

[0021] (3) Organic solvent extraction, the enzymatic hydrolysis product was dried, added cyclohexane 5 times its weight, centrifuged, extracted 3 times, and the cyclohexane layer was collected and combined;

[0022] (4) Concentration and purification, concentrating and recovering the organic solvent to obtain crude fish oil, washing the crude fish oil with 10% sodium chlorate solution for 1-2 times to obtain fish oil.

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PUM

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Abstract

The invention discloses a method for extracting fish oil from fish heads and fish skin. The method comprises the following steps: freezing, coarsely grinding and smashing the cleaned fish heads and fish skin; homogenizing to prepare homogenate; extracting by an organic solvent after enzymolysis; washing and purifying by using a sodium chloride solution after concentrating, so as to obtain the fish oil. By adopting the method, the fish heads and the fish skin are coarsely grinded and smashed after being frozen, and histocyte can be primarily destroyed, so that subsequent extraction of oil is facilitated. The histocyte is further destroyed by enzymolysis, so as to fully contact the organic solvent, and the extraction effect is good. In addition, the concentrated crude fish oil is washed by the sodium chloride solution, so that a few of soluble inorganic impurities can be removed, and the purity of the fish oil is improved.

Description

technical field [0001] The invention relates to a method for extracting fish oil from by-products of aquatic products, in particular to a method for extracting fish oil from fish heads and skins. Background technique [0002] Fish oil is rich in essential unsaturated fatty acids, especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which have been widely used in medicines, health products, and food . The content of EPA and DHA in marine fish is particularly high. The main functions of deep-sea fish oil are: lower cholesterol, prevent cardiovascular diseases; prevent blood coagulation and thrombosis, relieve stroke; reduce arteriosclerosis and high blood pressure; reduce blood viscosity and promote blood circulation; Improve memory, prevent aging, etc., and its role in preventing the spread of cancer is being studied. At present, the fishery processing in our country is still relati...

Claims

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Application Information

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IPC IPC(8): C11B1/10C11B1/02
Inventor 白义化
Owner WEIHAI YUWANG GRP MARINE BIOLOGICAL ENGCO
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