Propagation of Yeast for Removal of Sugars From Spent Sulfite Liquor
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United States of America Patent
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Oct 4, 2018
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Mar 28, 2018
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Mar 28, 2018
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Methods for production of yeast biomass and removal of sugar from red liquor by propagating yeast on sugars in red liquor byproduct of the sulfite pulping process are disclosed. Yeast are propagated using the sugars in red liquor as a carbon source, thereby consuming the sugars and producing a composition of lignosulfonates that has a reduced sugar content. Disclosed methods allow for separation of sugars from lignosulfonates in red liquor without costly ultrafiltration or nanofiltration processes and also produce valuable yeast biomass.
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