Digging gold from the waste of aquatic products is a good way to get rich

When processing or eating aquatic products, people often discard their leftovers and other processing by-products. In fact, after processing and comprehensive utilization of waste of aquatic products, it can turn waste into treasure, and can also avoid environmental pollution. It is a good way to get rich.

The proportion of aquatic product waste in aquatic products is quite large. Taking white peony as an example, about 40% of leftovers will be produced in the processing process, including 30% of fish heads, 8% of viscera, 1% of fish gills, and 1% of fish scales. Making full use of the leftovers of aquatic products and comprehensive processing and utilization are not only an important research direction for processing and utilization of aquatic products, but also an inevitable requirement for improving ecological and social benefits. The following is a detailed description of how to carry out the comprehensive utilization of waste of aquatic products for reference.

First, the use of internal organs can be used to process fish oil and fish meal. Fish oil is mainly used to extract cod liver oil. It can also replace mineral oil as a leather preparation, or it can be used in the manufacture of medicines for treating diseases such as diabetes and hypertension. Among the fatty acids that make up fish oil, 70%-80% are unsaturated fatty acids, which are rich in docosahexaenoic acid and eicosapentaenoic acid. This natural substance can make the brain enhance memory and thinking ability. Preventing memory loss, increasing cholesterol, and lowering blood pressure can be of great benefit. At the same time, the internal organs can be made into liquid fish protein feeds by chemical methods or biological methods, and their nutritional value and feeding effect can be equivalent to fish meal. Generally, the scraps processed per ton of fish can produce 30 kilograms of fish oil and more than 200 kilograms of high-quality fishmeal. According to studies, the internal organs or waste of fish are refined through special processing, and then can be made into various health products with other accessories, such as strong fish oil foods and low-cholesterol brain-enriched foods, which are popular in the market. Fish roe can be processed into fish roe foods. Because it is rich in lecithin and other substances and has health benefits, it is popular with women, children and the elderly.

Second, the use of scales, skins, shells contain more lecithin and a variety of unsaturated fatty acids, but also contains a variety of minerals, enhance human brain memory, delay brain cell aging, reduce cholesterol deposition in the blood vessel wall, promote Blood circulation, prevention of hypertension and heart disease. The fish scales can be processed into fish scales after being decolorized, acid-base treated and smelted, gelled, and dried. They are widely used in food, medical and other fields. Fish scales can also be processed into fish scales, not only rich in nutrition, but also the beauty and emollient. The protein in the fish scale is proteolytically hydrolyzed and the prepared hydrolysate can be used for the production of seasonings and as an additive for functional foods. Fish and silver is an expensive special industrial product extracted from the scales. Its appearance is pure silver white and has a high degree of luster. It is widely used in pearl decoration industry and paint manufacturing industry as a raw material for medicines and biochemicals. . Treated fish scales can also be used to process fishmeal. The economic benefits are considerable. Fish skin is a seafood product rich in glial proteins. According to laboratory tests, every 100 grams of fish skin contains 67.1 grams of protein, 0.5 grams of fat, 11.1 grams of sugar, and contains calcium, phosphorus, iron and other minerals and vitamins. In addition, as an important leather raw material, skins can be made into leather shoes, purses, wallets, gloves and other items, which are highly favored by consumers and can be earned through foreign exchange. Shell can be used to process nacre powder and shell powder. Nacre powder is widely used in medicine and cosmetics manufacturing; shell powder is an indispensable raw material for feed processing. In addition, shrimp heads and crab shells can process chitin. Chitin is extremely versatile and can be used as a drug for treating wastes, food preservatives, adhesives, plant growth regulators, etc. It can be widely used in paper, textile, food, pharmaceutical and other industries. The market is in short supply.

Third, the use of fish bone Fish head, fish bone can be processed into fish meal, fish bone paste, calcium carbonate and other complex functional foods. Fish head can be made into flavor foods after cooking, enzymatic hydrolysis, reaction, filtration and other processes. It can be used directly as a seasoning, or it can be added to soy sauce or chicken essence to make a complex seasoning. Fish and bone meal is mainly used as a feed additive, and it can also be added to surimi products such as fish sausages to reduce costs and strengthen nutrition. The complex amino acid calcium, which is made by crushing and digesting fish heads and fish bones, is a kind of health product that enhances nutrition and supplements calcium. The market prospect is very broad. Fish bone contains natural high-quality calcium and various trace elements that can promote human growth and development, such as phosphorus, iron, and selenium. The most popular “fish protein calcium sugar” and calcium refined products on the market, its main raw material is the nutrition and health foods such as fish bones; it is easy to digest and absorb, eats can increase appetite, promote growth and development, is a teenager, pregnant women, infants and young children. The ideal nutritional health food for the elderly.

Fourth, the use of fish guts from the fish can be extracted from the intestine protease, this enzyme is mainly found in digestive enzymes in fish, with a catalytic reaction to accelerate the chemical reaction, can be widely used in the manufacture of cleaning agents, remove dirt and stains. In addition, it is also widely used in the food processing industry and biological research.

Fifth, the use of fins can be processed into shark fins. Generally choose fins with more fins and fewer bones, remove the meat attached to the base of the fins, and dip, warm, de-sand, remove bones, pick wings, remove glue, bleach, and dry. It contains a variety of essential amino acids and is easy to digest and absorb. It has a high nutritional value. At present, the processing and utilization of fins is generally based on marine fish, and the processing and utilization of freshwater fish fins needs further research and development.

Sixth, the use of fish gills fish gills can be processed fish glue. The fish gills, scales, bones, fins, skin and other collagen leaching, acid hydrolysis, kneading, drying can be made fish glue. Fish gelatin has a wide range of uses in food, printing, photography, medicine, and biochemical preparations.