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Complete Butter Production Line:

Figure schematically shows both batch production in a churn and continuous production in a butter making machine. The cream can be supplied by a liquid milk dairy (surplus cream). From the intermediate storage tank the cream continues to pasteurization at a temperature of 95C or higher. The high temperature is needed to destroy enzymes and micro-organisms that would impair the keeping quality of the butter. The heat treatment releases strongly anti oxygenic sulphhydryl compounds, which further reduce the risk of oxidation.

complete butter production machinery

Vacuum desecration can also be included in the line if the cream has an undesirable flavor or aroma, e.g. onion taste. Any flavoring will be bound in the fat and transmitted to the butter unless removed. After this the cream is returned to the pasteurizer for further treatment heating, holding and cooling before proceeding to the ripening tank. In the ripening tank, the cream is subjected to a temperature program which will give the fat the required crystalline structure when it solidifies during cooling. The program is selected to match factors such as the composition of the butter fat, expressed for example in terms of iodine value, which is a measure of the unsaturated fat content. The treatment can also be modified to produce butter with good consistency despite a low iodine value, e.g. when the unsaturated proportion of the fat is low. Ripening usually takes 12 15 hours. Where possible, the acid producing bacteria culture is added before the temperature treatment. The quantity of culture added depends on the treatment program selected with reference to the iodine value.

From the ripening tank the cream is pumped to the continuous butter-maker or the churn. In the churning process the cream is agitated violently to break down the fat globules, causing the fat to coalesce into butter grains. The cream is split into two fractions: butter grains and buttermilk. In traditional churning the machine is stopped when the grains have reached a certain size, and then the buttermilk is drained off. Buttermilk drainage is continuous in continuous butter making machines. After drainage the butter is worked to a continuous fat phase containing a finely dispersed water phase. If the butter is to be salted, salt is spread over the surface in batch production, or added in slurry form during the working stage in continuous butter making. After salting, the butter must be worked further to ensure uniform distribution of the salt. The working of the butter also affects the characteristics by which the product is judged aroma, taste, keeping quality, appearance and color. The finished butter is discharged into the packaging unit and thence to cold storage.

Butter Plant Diagram:

complete butter production line flow chart

General process steps in batch and continuous production of butter:

  1. Milk reception
  2. Preheating and pasteurization of skim milk
  3. Fat separation
  4. Cream pasteurization
  5. Vacuum desecration (when used)
  6. Culture preparation (when used)
  7. Cream ripening and souring (when used)
  8. Temperature treatment
  9. Churning/working (batch)
  10. Churning/working (continuous)
  11. Butter milk collection
  12. Butter silo with screw conveyor
  13. Packaging machines


  1. Opportunity to produce more than one product with the same processing line.
  2. Opportunity to realize products with customized recipes.
  3. High quality of the final product keeping an elevated nutritional value.
  4. Wide customization of the final product.
  5. Complete line supervision system through monitoring of every process phase.
  6. Highest energy savings thanks to the most advanced technologies.
  7. Recording, visualization and printing of all daily production data.
  8. Maximum yield, minimum production waste.

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