This is not new and has been going on long before I got into the dairy industry in 1990, we used special giant 10 ton centrifuges to separate out all the different parts, some went for milk additives while most were shipped to California and Texas as cattle feed and whey by products. To be fair all raw milk was held in a holding silo and tested for somatic cells and antibiotics before being commingled. I was trained on $200k Foss analyzers that did what you say - sorry it was 20 years ago and didn't know then.