In the production of butter oil, the cream concentration
stage is followed by the phase inversion process. Then
the emulsion and the heavy phase (serum phase) are
separated from the product by an oil concentrator, which
increases the oil concentration to up to 99.5%. The reduction
in free fatty acids (FFA) is obtained by washing the oil with
water that is separated from it again together with the
undesired FFA in an oil polishing separator. A vacuum dryer
further reduces the moisture in the fi nal product to >99.8%.