Most of our modern plants employ some mechanical process for removing the foreign material from milk as it is received from the producer. The two types of equipment in general use are the filter and the clarifier, both of which have been considered successful in removing this material. The most important points for study seem to be the effect of clarification and filtration on quality of milk and the composition of the materials removed by each process. The principle of the centrifuge embodied in the clarifier would lead one to conclude that all matter of a specific gravity greater than milk would be removed by the clarifier. The filter on the other hand depends upon enmeshing solid particles in the fleecy surface of the filter cloth. Obviously the clarifier may remove semi-soluble material of smaller dimensions than the interstices in the filter, while the filter can only remove material which is too large to pass through the cloth. Whether the removal of this semi-soluble material is of importance or not should be indicated by the tests on keeping quality of the milk and also in the analysis of the material itself. A comparison of the two processes must not only consider the efficiency of sediment removal but also the composition of the material removed and the effect of the process upon the quality of milk. The study herein reported considers these points under conditions of actual plant practice.
milk filtration, milk clarification, milk clarifier
South Dakota Experiment Station, South Dakota State College of Agriculture and Mechanical Arts
Jacobsen, D.H. and Olson, T.M., "Clarification versus Filtration of Milk" (1931). Research Bulletins of the South Dakota Agricultural Experiment Station (1887-2011). 257.