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Conditioning hardwood-derived pre-pulping extracts for use in fermentation through removal and recovery of acetic acid using trioctylphosphine oxide (TOPO)

  • Byung-Hwan Um , Benjamin Friedman and G. Peter van Walsum EMAIL logo
Published/Copyright: October 14, 2010
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Holzforschung
From the journal Holzforschung Volume 65 Issue 1

Abstract

Extraction characteristics are shown for trioctylphosphine oxide (TOPO) dissolved in alkane for recovery of acetic acid from dilute water solution and hardwood-derived hemicellulose extracts. The recovery of acetic acid with TOPO is significantly influenced by the pH in the aqueous phase and lightly affected by temperature. In a one-stage extraction, 76.0% of the acetic acid could be extracted below pH 3. The yield of fractional extractions increase with increasing TOPO concentration in alkane and with increasing acetic acid concentration in the aqueous phase. It was found that for dilute extractions carried out at 70°C and pH 1, the solvent extraction is effective at 37% TOPO in alkane (w/w) and that little improvement is realized by further increases in TOPO concentration. Partition coefficients for green liquor and hot water extracts ranged between 2.0 and 2.5 at the tested conditions. Fermentation of hemicellulose extracts that had been treated with TOPO for removal of acetic acid was tested to determine whether TOPO processing resulted in any positive or adverse affects on the microbial activity. Fermentation of TOPO-treated green liquor hemicellulose extract with Pichia stipitis resulted in improved ethanol production relative to untreated extract. Accordingly, placement of TOPO extraction after hydrolysis and prior to fermentation is optimal for acetic acid recovery and maintenance of fermentation rates.

Keywords: acetic acid; hemicellulose extract; liquid-liquid extraction (LLE); Pichia stipitis CBS 6054; trioctylphosphine oxide (TOPO)
Corresponding author. Forest Bioproducts Research Institute, Department of Chemical and Biological Engineering, University of Maine, 5737 Jenness Hall Rm 311, Orono, ME 04469-5737, USA Phone: +1-207-581-2226 Fax: +1-207-581-2323
Received: 2010-4-6
Accepted: 2010-6-8
Published Online: 2010-10-14
Published in Print: 2011-01-01

©2011 by Walter de Gruyter Berlin New York

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https://doi.org/10.1515/hf.2010.115
Keywords for this article
acetic acid; hemicellulose extract; liquid-liquid extraction (LLE); Pichia stipitis CBS 6054; trioctylphosphine oxide (TOPO)

Articles in the same Issue

  1. Publisher's Note
  2. Publisher's Note
  3. Original papers
  4. Novel paper sizing agents from renewables. Part 1: Preparation of a paper sizing agent derived from natural plant oils
  5. Novel paper sizing agents from renewables. Part 2: Characterization of maleated high oleic sunflower oil (MSOHO)
  6. Novel paper sizing agents from renewables. Part 3: Emulsion stability and hydrolysis behavior compared to conventional sizes
  7. Energy saving potential of high yield pulp (HYP) application by addition of small amounts of bleached wheat straw pulp
  8. Characterisation of Norway spruce hemicelluloses extracted by pressurised hot-water extraction (ASE) in the presence of sodium bicarbonate
  9. Fractionation and characterization of lignin-carbohydrate complexes (LCCs) from eucalyptus fibers
  10. Conditioning hardwood-derived pre-pulping extracts for use in fermentation through removal and recovery of acetic acid using trioctylphosphine oxide (TOPO)
  11. Xylitol production from olive-pruning debris by sulphuric acid hydrolysis and fermentation with Candida tropicalis
  12. Changes caused by heat treatment in chemical composition and some physical properties of acacia hybrid sapwood
  13. Near infrared spectroscopy (NIRS) as a potential tool for monitoring trade of similar woods: Discrimination of true mahogany, cedar, andiroba, and curupixá
  14. Reactive maleic anhydride polyolefins (MAPOs) in oriented strand board. Part 1: Dynamic thermomechanical properties of phenol formaldehyde resins blended with two MAPOs
  15. Reactive maleic anhydride polyolefins (MAPOs) in oriented strand board. Part 2: Influence on physical and mechanical properties
  16. Theoretical analysis of moisture transport in wood as an open porous hygroscopic material
  17. A multinuclear magnetic resonance imaging (MRI) study of wood with adsorbed water: Estimating bound water concentration and local wood density
  18. Mechanical characterization of single bamboo fibers with nanoindentation and microtensile technique
  19. Longitudinal mechanical properties of cell wall of Masson pine (Pinus massoniana Lamb) as related to moisture content: A nanoindentation study
  20. Short Note
  21. Sorption isotherm of lodgepole pine (Pinus contorta Dougl. Ex Loud.) pulp chips affected by the mountain pine beetle (Dendroctonus ponderosae)
  22. Meetings
  23. Meetings
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