METHOD FOR CONDITIONING AND PROCESSING WHOLE OR THIN STILLAGE TO AID IN THE SEPARATION AND RECOVERY OF PROTEIN AND OIL FRACTIONS
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United States of America
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Apr 14, 2022
app pub date -
Oct 11, 2021
filing date -
Oct 11, 2021
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Abstract
A method of processing thin stillage in an ethanol refining operation is provided. In one embodiment, the method comprises treating stillage with an inverse emulsion comprising at least one anionic flocculant and an emulsifying agent selected from a sorbitan ester of a fatty acid, an ethoxylated sorbitan ester of a fatty acid, and combinations thereof, thereby forming treated stillage; clarifying the treated stillage via at least one of dissolved air flotation and induced air flotation, thereby forming clarified thin stillage and a float layer comprising oil and solids; separating the oil from the solids of the float layer; and recovering the oil.
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