What is "Casein" ?
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What is "Casein" ?
Casein is a protein that is found in milk and used independently in many foods as a binding agent. Technically, it is part of a group called phosphoproteins, collections of proteins bound to something containing phosphoric acid. Casein may also be called caseinogen, particularly in European foods.
Extracting milk casein always begins with the refining process for whole milk. Just as whole milk goes through a process to separate the cream, the casein will also be separated by the use of filtering agents and various churning methods that allow the fat to rise to the top. Once the milk has been separated, the salt caseinate and calcium caseinate enzymes are retained in the skimmed milk. Removing the fat before attempting to extract the casein from the milk product greatly simplifies the process.
In order to remove the casein from the skimmed milk, the product goes through a process known as precipitation. Essentially, the skimmed milk is heated under strictly controlled conditions. As the heating takes place, the casein content begins to shrink and expel moisture. The result of this action is known as whey. At the same time, this process creates milk curd that is clumped with the whey.
The next step in extracting the casein involves separating the whey from the curd. After the separation, the curd is subjected to pressure to further remove the water content. When the moisture content is reduced to an acceptable level, the curd is dried using a hot air system. Alternating heating and cooling then takes place until the substance is a combination of various size particles. These particles or grains contain the extracted milk protein known as casein.
After the particles are dried, the will be milled and sifted according to the size of the particles. The casein can then be packaged and sold to different manufactures for use in a wide range of products. Casein is usually sold in textures that are defined as coarse, medium, and fine.
Extracting milk casein always begins with the refining process for whole milk. Just as whole milk goes through a process to separate the cream, the casein will also be separated by the use of filtering agents and various churning methods that allow the fat to rise to the top. Once the milk has been separated, the salt caseinate and calcium caseinate enzymes are retained in the skimmed milk. Removing the fat before attempting to extract the casein from the milk product greatly simplifies the process.
In order to remove the casein from the skimmed milk, the product goes through a process known as precipitation. Essentially, the skimmed milk is heated under strictly controlled conditions. As the heating takes place, the casein content begins to shrink and expel moisture. The result of this action is known as whey. At the same time, this process creates milk curd that is clumped with the whey.
The next step in extracting the casein involves separating the whey from the curd. After the separation, the curd is subjected to pressure to further remove the water content. When the moisture content is reduced to an acceptable level, the curd is dried using a hot air system. Alternating heating and cooling then takes place until the substance is a combination of various size particles. These particles or grains contain the extracted milk protein known as casein.
After the particles are dried, the will be milled and sifted according to the size of the particles. The casein can then be packaged and sold to different manufactures for use in a wide range of products. Casein is usually sold in textures that are defined as coarse, medium, and fine.
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