Methods of improving the quality of by-products or residues derived from starch-containing material in a processes for producing fermentation products including adding an enzyme composition comprising an enzyme or a mixture of enzymes capable of degrading one or more fermented mash components to fermented mash; and separating fermentation product. Each stage includes a detector, a regenerator, and a subtractor. The pressure lock system includes a pair of locking gate valves and a pressure adjustment chamber configured to transition the articles being heated from the thermalization zone to the microwave heating zone, which may be operated at different pressures. 0 to 100 when the polyester resin is molded in a diameter of 5 cm and a thickness of 2 mm. A normalized energy function across one or more of the one or more transitions is calculated, a configuration of flow areas within the color Doppler data is determined, and aliasing corrections for the color Doppler data are determined based on the normalized energy functions and the configuration of flow areas.