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Reappraisal of the Quality Control of Milk Supplies from Farm Bulk Tanks

American Dairy Science Association, North Miami, Florida

ABSTRACT

The advent and widespread use of the farm bulk tank for milk supplies have contributed richly to improving the quality of milk available for pasteurization. Any milk inspector or dairy sanitarian can not help being impressed with the dramatic reduction in the standard plate counts of raw milk from farm bulk tanks and the reduction in counts for thermoduric bacteria after laboratory pasteurization.

Without deprecating the value of the contribution which the farm bulk tank has made, it is in order to temper the first blush of enthusiasm with more deliberate analysis of how this important improvement is effected and where it fits into the over-all problem of quality milk.

Eight items are offered for consideration:

(1) It should be recognized that the contribution to the improvement in quality of milk from a farm bulk tank depends largely upon (a) the elimination of the conventional 10-gal. can with its attendant can washer—two pieces of equipment which were frequent sources of trouble, and (b) the prompt cooling of milk to temperatures below 40° F., which is considerably below those thought possible in can-cooling tanks.

¹ Formerly Director of Research, H. P. Hood and Sons, Boston, Massachusetts.