Processing of marine low value fish
The world’s major economic fish stocks in the ocean have withered, and low-value trash fish have various disadvantages, resulting in inadequate fishing and processing. The processing status of marine low-value trash fish is currently mainly in several ways:
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1. Animal protein feed: Due to the rapid development of global aquaculture and special aquaculture, the demand for animal protein feed has grown rapidly, with an average annual growth rate of more than 37%. Animal protein feed has the advantages of high protein content, high animal meat yield, and easy composition with other ingredients, but from the current global situation of fishmeal production, the general low grade, processing technology is not perfect, causing fish meal prices are low, some Fishmeal with high protein content, such as special shrimp powder, turtle powder, etc. can not fully meet people's needs.
2. Surimi products: Fish surimi products have the same features as animal protein feeds. The selection of raw materials depends on the type of fish, body size and organizational structure. Fish of different species can be used together. The production process of surimi products and simulated seafood products is relatively simple. Generally, the raw fish is first subjected to meat extraction, rinsing, and ingredient processing, followed by gelation, molding, and other steps to produce products having similar appearance and taste to natural products. . However, large-scale production must solve a series of technical and equipment problems. At present, there are only a few countries that have conducted definite research on the characteristics of different species of fish carcasses and how to prevent freezing damage during storage. There are only a few special equipment and special production lines, and the amount of starch used in surimi products is generally higher, so that the taste is affected. With the impact, the market potential has not yet been fully explored.
3. Fish oil processing: Compared with other fish oils, the EPA and DHA contents of marine low-value trash fish oil are not significantly different. Moreover, due to the smaller fish body of such fish, the proportion of the head is relatively large, and the oil yield is rather high. It is high, and there are no cumbersome processes such as picking fish heads, picking up fat from eye sockets, and so on.