Preprint Article Version 1 This version not peer reviewed

Purification of Polymer-Grade Fumaric Acid from Fermented Spent Sulfite Liquor

Version 1 : Received: 28 February 2017 / Approved: 1 March 2017 / Online: 1 March 2017 (09:41:31 CET)

A peer-reviewed article of this Preprint also exists.

Figueira, D.; Cavalheiro, J.; Ferreira, B.S. Purification of Polymer-Grade Fumaric Acid from Fermented Spent Sulfite Liquor. Fermentation 2017, 3, 13. Figueira, D.; Cavalheiro, J.; Ferreira, B.S. Purification of Polymer-Grade Fumaric Acid from Fermented Spent Sulfite Liquor. Fermentation 2017, 3, 13.

Journal reference: Fermentation 2017, 3, 13
DOI: 10.3390/fermentation3020013

Abstract

Fumaric acid is a chemical building block with many applications, namely in the polymer industry. The fermentative production of fumaric acid from renewable feedstock is a promising and sustainable alternative to petroleum-based chemical synthesis. The use of existing industrial side-streams as raw-material within biorefineries potentially enable production costs competitive against current chemical processes, while preventing the use of refined sugars competing with food and feed uses and avoiding purposely grow crops requiring large areas of arable land. However, most industrial side streams contain a diversity of molecules that will add complexity to the purification of fumaric acid from the fermentation broth. A process for the recovery and purification of fumaric acid from complex fermentation medium containing spent sulfite liquor (SSL) as carbon source was developed and is herein described. A simple two-stage precipitation procedure involving separation unit operations, pH and temperature manipulation and polishing through the removal of contaminants with activated carbon allowed the recovery of fumaric acid with 68.3% recovery yield with specifications meeting the requirements of the polymer industry. Further, process integration opportunities were implemented that allowed minimizing the generation of waste streams containing fumaric acid which enabled increasing the yield to 81.4% while keeping the product specifications.

Subject Areas

fumaric acid; purification; spent sulfite liquor; biorefineries

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