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As with all other parts of a milking plant the milk cooling tank also has to be cleaned. This should be performed immediately after it has been emptied. Small tanks are usually cleaned manually. Larger tanks are often cleaned by means of automatic cleaning units, since it is difficult to reach all surfaces manually.
Cleaning of a milk cooling tank.
Automatic cleaning units clean the cooling tank by spraying. The cleaning solution is pumped through one or two spreaders, which direct the cleaning solution as spray towards the surfaces to be cleaned.
Principally, the cleaning of the milk cooling tank is divided into the same phases used for the circulation cleaning of the rest of the milking plant. A lukewarm prerinse is followed by a circulation cleaning with hot water and a final cold rinse.
Due to the large cold surfaces of the cooling tank, it is often difficult to maintain proper temperature of the circulation water. Therefore, it is essential that the start temperature of the circulation phase water is as high as possible.
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