Method for reducing dissolved loss of water-soluble vitamins in aquatic expanded feed

Abstract

The invention belongs to the technical field of feed processing and specifically relates to a method for reducing dissolved loss of water-soluble vitamins in an aquatic expanded feed. The method for reducing dissolved loss of water-soluble vitamins in the aquatic expanded feed comprises the following steps of: preparing W / O (water / oil) emulsion, using protein emulsifier edible gelatin, hydrolyzed soy protein or whey protein in the process of preparing the W / O emulsion, and then using the W / O emulsion for the post spraying of the feed. The method provided by the invention can greatly improve the stability of the water-soluble vitamins in the aquatic feed and reduce the dissolved loss, is suitable for the processing of expanded feed; and due to the fact that the current processing of the expanded feed has the step of spraying grease after expanding, the method can be used very conveniently in the conventional technology line, thus the method is convenient and applied.

Description

technical field [0001] The invention belongs to the technical field of feed processing, and in particular relates to a method for reducing the dissolution and loss of water-soluble vitamins in aquatic puffed feed. Background technique [0002] Feed processing (conditioning and granulation, puffing) will directly lead to heat damage of some heat-sensitive micronutrients, the most representative is vitamins, for example, VA (vitamin A), VD (vitamin D) without protection treatment ), VE (vitamin E), VC (vitamin C) and VK (vitamin K) lose about 20-50% after extrusion processing, and B vitamins also lose about 10%-20%, so in actual feed production Basically, stabilized vitamin forms are used. For example, tocopherol acetate and VA acetate are used to replace ordinary VA and VE respectively, and the method of coating or carrier adsorption is used to further improve stability; VC phosphate is used instead of VC, sulfurous acid Sodium hydrogen sodium menaquinone complex (MSBC) repl...

AI Technical Summary

Problems solved by technology

[0005] 1) Using the method of excessive addition, but excessive addition will not only increase the cost, but more importantly, there is considerable blindness, which does not fundamentally solve the problem;

[0006] 2) The coating method is adopted, but since the coated object is a water-soluble core material, it is difficult to form an emulsion system for producing microcapsules at a low cost. There are some reports using lipid compounds, such as : Stearic acid, hardened oil or paraffin are used as the wall material, and the method of spray cooling is adopted to form water-soluble core material and lipid compound chimera, but unfortunately due to cost, the melting point of the material used is very low (less than 70°C ), so the wall material has been melted and loses its effect during the tempering or puffing process, so it is still not possible to overcome the problem of dissolution and loss

However, if high melting point wall materials are used, there will be problems of cost and absorption;

[0007] 3) Use the W / O type water-soluble vitamin emulsion specially for post-spraying (Wang Weiguo 2001, Deng Junming 2004, Zhao Chenwei 2006), but the interface film between the oil phase and the water phase in the W / O emulsion formed in this way is a small molecule The interfacial film has poor strength and is easy to rupture under the action of external shear force or osmotic pressure, so the water-soluble core material wrapped by the oil phase will still dissolve in large quantities, and it will still cause the dissolution of water-soluble components, such as in After the water-in-oil emulsion of pepsin is sprayed on the pellet feed (pepsin is in the water phase), 50% will be lost after soaking in water for 40 minutes (Zhao Chenwei 2006)

Images