A method and apparatus for removing settleable solids and unsettleable
solids from a partially closed flush system in a diary milking operation
whereby a first processing tank bottom removes settleable solids
contained therein where the net current flow vertically in the process
tank is less than the settling rate of the settleable solids contained
therein. The process tank batch feeds a plurality of thickening tanks
that are each allowed to settle for a period of time before transferring
fluid is to a second separator. The method and apparatus is particularly
conductive for feeding a digester.