GEA is an enormous processing equipment group that includes previous independent processors such as Westfalia, Wiegand, APV Kestner and Niro from the days when I still worked in processing.
click the image to visit the website
This website is that of the separator, decanter and process line part of their business. It presents a wealth of general information on many beverage and dairy processes with links to their equipment pamphlets. Each process is described in detail with a process flowsheet.
While you might be tempted to dismiss this as a source of information because of it equipment supplier link, I believe the information is general enough and unbiased to be useful.