The centrifuged cream obtained is a whey cream, which, as is, can be sold, used to make butter or added to the skimming cream, lending itself to becoming an interesting source of additional income thanks to the extraction of the residues produced that can be easily transformed, for example, into pharmaceutical and/or food supplements.In particular, after the first cycle, 35% of the proteins and 80% of the animal oils and fats are extracted from the whey samples, while 80% of the proteins and 85% of the animal oils and fats are extracted from the washing water of the dairies.
Oils and fats are arranged on the surface and can therefore be removed with simple spatula systems.
Once the fats have been removed, during the second cycle on waters now free of fat and protein molecules, the COD and BOD will be reduced.
From experiments conducted, after the treatment, the whey sees both values reduced by 36% while the washing waters of the dairies see both values reduced by 11%.
Finally, from the laboratory analyses an unexpected action emerges: in the liquids subjected to the two cycles, dissolved salts are also involved producing an interesting increase in the conductivity of the fluids.
