Fermentative volatile fatty acid production and recovery from grass using a novel combination of solids separation, pervaporation, and electrodialysis technologies

Research output: Contribution to journalArticlepeer-review

Abstract

A novel combination of solids screening, centrifugation, microfiltration, pervaporation, and electrodialysis were used for the targeted and exclusive recovery of volatile fatty acids (VFAs) from an 80 L bioreactor. The bioreactor was continually–fed with grass waste, containing 40 g L–1 total solids, over three, seven–day, hydraulic retention times. A VFA solution with a concentration up to 4,500 mg L–1 was recovered. VFA yields were also increased from 707 to 875 mg of VFA per gram of volatile solids by alleviating end–product inhibition. Both these accomplishments are significant step–changes in adding value to waste, and increased substrate utilisation rates will be attractive from a waste remediation perspective.
Original languageEnglish
Article number125926
JournalBioresource Technology
Volume342
Issue number00
Early online date13 Sep 2021
DOIs
Publication statusPublished - 1 Dec 2021

Keywords

  • Anaerobic Digestion
  • Biorefining
  • VFAs
  • Electrodialysis
  • Platform Chemicals

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