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The Efficiency of the Farm-Size Mechanical Separator in Withholding Extraneous Matter from Cream^1,2

Kansas Agricultural Experiment Station, Manhattan

ABSTRACT

The problem of extraneous matter in farm-separated cream is becoming increasingly important. In order to develop effective control measures, information is needed on the amount of contamination occurring at the various stages of production and marketing of cream. The possible sources of contamination of milk are fairly well established. The first stage of study on sources of sediment contained in cream when it arrives at the creamery would seem to be as the cream comes from the separator. The centrifugal action of the mechanical cream separator bowl together with the accumulation of separator slime during the separation process raised the question regarding the efficacy of the separator as a means of removing extraneous matter from cream during the separation process. The question also arises as to whether the mechanical cream separator will remove some types of material and not others. The amount of sediment found in cream as it comes from the separator will indicate whether primary emphasis should be placed on production practices prior to separation or on later stages of handling, if cream relatively free from sediment is to be obtained.

¹ Contribution no. 168, Department of Dairy Husbandry.

² This study was supported by a grant from Swift and Company, Chicago, Illinois.