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1. Overview

Meat meal, meat and bone meal (meat meal; meat and bone meal) is the residual bone, dander, internal organs, minced meat and other raw materials from the scraps of slaughterhouses and meat processing plants after removing the edible parts. And the products made. In addition, animal bodies that died of non-communicable diseases, animal carcass residues from fat plants, liver residues and intestinal residues from animal organs, can also be used to process meat and bone meal. Due to the different raw materials, the finished product can be meat meal or meat and bone meal. Meat meal is a feed made of pure meat or minced meat. Bone meal (bone meal) is a feed made of animal bones after defatting and degumming. my country stipulates that the bone content in meat meal exceeds 10%, which is meat and bone meal. In the United States, those with less than 4.4% phosphorus are called meat meal, and those with more than 4.4% are called meat and bone meal.

In foreign countries, countries such as the United States, the former Soviet Union, Australia, Argentina, New Zealand, Brazil and other countries produce a lot of meat meal and meat and bone meal. In my country, the heads, hooves, and offal of animals (pigs, sheep, etc.) are processed and consumed more, but the amount of meat meal and meat and bone meal used in the production of feed is very small. Since the pathogens of many malignant diseases, such as the mad cow disease virus, have proved to be transmitted to humans through animal feed products, the use of animal products as feed will be strictly restricted in order to ensure the safety of animal products and human health.

2. Meat and bone meal processing technology

According to the processing process, the processing methods of meat and bone meal and meat meal mainly include wet production and dry production.

(1) Wet production is to directly pass steam into a pressure cooking tank containing raw materials, heat the oil to form a liquid filter and separate the solid, and then further separate the solid part by the pressing method, and then dry and crush it. Get the finished product. The liquid part is used for oil extraction.

(2) Dry production is to preliminarily mash the raw materials, put them in a double-walled cooking tank, separate the fat by indirect heating with steam, then pulverize the solid part appropriately, separate the residual fat by pressing, and then separate the solid part After drying, the finished product can be obtained by crushing.