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1. (WO2018183498) PROPAGATION OF YEAST FOR REMOVAL OF SUGARS FROM SPENT SULFITE LIQUOR

Pub. No.:    WO/2018/183498    International Application No.:    PCT/US2018/024846
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Thu Mar 29 01:59:59 CEST 2018
IPC: D21C 11/00
Applicants: DOMTAR PAPER COMPANY, LLC
Inventors: NARENDRANATH, Neelakantam
Title: PROPAGATION OF YEAST FOR REMOVAL OF SUGARS FROM SPENT SULFITE LIQUOR
Abstract:
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.