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 Patent
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Oct 3, 2017
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app pub date -
Nov 19, 2010
filing date -
Nov 19, 2010
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Abstract
A method of processing thin stillage in an ethanol refining operation is provided. The method comprises treating thin stillage upstream of a concentration or evaporation step 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 thin stillage; clarifying the treated thin 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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