Process for producing animal grease for feed

Abstract

The invention provides a method for producing animal grease for feed. The method comprises the following steps: (1) selecting materials, and pre-treating; (2) heating a pot in vacuum, adding water, heating, and vacuumizing; (3) adding neutral protease; (4) insulating thermally, stirring, keeping on heating, and performing enzyme deactivation; (5) separating solids from liquid; (6) separating oil from water; (7) feeding grease into the pot for heating, cooling, inspecting and storing; (8) treating wastewater; and (9) performing spray-drying on oil residues to obtain protein powder, packaging and warehousing for later use. According to the process, water and neutral protease are added for low-temperature oil refining in the production process, so that high-temperature destruction and oxidation generated by oxygen can be reduced, the animal grease has lower acid value and peroxide value, has richer fragrance, good appearance, white color, environmental friendliness, energy conservation, high efficiency, high grease quality, small consumption and high yield, and is a high-quality feed raw material since the grease quality is maintained; and the separated oil residues can be used for preparing protein powder by means of spray drying, and can be applied to feed raw material, fish meal replacement and the like, so that pollution for the environment can be reduced, waste is turned to be useful, and cost can be saved.

Description

technical field [0001] The invention relates to the technical field of feed, in particular to a production process of animal fat for feed. Background technique [0002] Oil is a very important feed raw material, which can increase the energy of feed, promote the absorption of fat-soluble vitamins and pigments, increase the growth rate and productivity of animals, and reduce the occurrence of diseases. Oils and fats generally include animal fats and vegetable oils. For a long time, the oil refining process adopted by my country's animal oil production enterprises is generally the traditional dry refining or wet refining. During the processing and storage of raw oil and fat, due to the air, Affected by factors such as temperature, light, moisture, metal ions and the fatty acid composition of the oil itself, complex chemical changes will occur, resulting in oxidative rancidity of the oil, and the problem of high acid value and peroxide value of the oil. The acid value of the oil...

AI Technical Summary

Problems solved by technology

Oils and fats generally include animal fats and vegetable oils. For a long time, the oil refining process adopted by my country's animal oil production enterprises is generally the traditional dry refining or wet refining. During the processing and storage of raw oil and fat, due to the air, Affected by factors such as temperature, light, moisture, metal ions and the fatty acid composition of the oil itself, complex chemical changes will occur, resulting in oxidative rancidity of the oil, and the problem of high acid value and peroxide value of the oil. The acid value of the oil is One of the important indicators of the quality of oil and fat. Excessive acid value will not only deteriorate the flavor and quality of the oil, but also cause harm to animal health.

Dry refining is smelting under normal pressure, and the raw fat is in contact with the air for a long time. At high temperature, although the Maillard reaction can produce fat-flavored oil, it is dissipated quickly and easily produces oily acid. value, peroxide value exceeds the standard, and the emitted gas has a smell, which has a certain impact on the environment

Wet method vacuum smelting, because direct steam is used for smelting, the oil has a lighter color, but the oil has a high water content. If it is not treated in time, it is easy to cause oil rancidity, and the oil residue has a high water content and becomes a paste. At present, there is no suitable equipment for processing , direct discharge not only pollutes the environment, but also causes waste