Title: Recovery of Salts from Synthetic Erythritol Culture Broth via Electrodialysis: An Alternative Strategy from the Bin to the Loop
Authors: Daza-Serna, Laura 
Knezevic, Katarina  
Kreuzinger, Norbert  
Mach-Aigner, Astrid 
Mach, Robert 
Krampe, Jörg  
Friedl, Anton  
Category: Original Research Article
Issue Date: 11-Jan-2022
Citation: 
Daza-Serna, L., Knezevic, K., Kreuzinger, N., Mach-Aigner, A., Mach, R., Krampe, J., & Friedl, A. (2022). Recovery of Salts from Synthetic Erythritol Culture Broth via Electrodialysis: An Alternative Strategy from the Bin to the Loop. Sustainability, 14(2), 1–18. https://doi.org/10.3390/su14020734
Journal: Sustainability 
ISSN: 2071-1050
Abstract: 
Sustainability and circularity are currently two relevant drivers in the development and optimisation of industrial processes. This study assessed the use of electrodialysis (ED) to purify synthetic erythritol culture broth and for the recovery of the salts in solution, for minimising the generation of waste by representing an efficient alternative to remove ions, ensuring their recovery process contributing to reaching cleaner standards in erythritol production. Removal and recovery of ions was evaluated for synthetic erythritol culture broth at three different levels of complexity using a stepwise voltage in the experimental settings. ED was demonstrated to be a potential technology removing between 91.7–99.0% of ions from the synthetic culture broth, with 49–54% current efficiency.
Besides this, further recovery of ions into the concentrated fraction was accomplished. The anions and cations were recovered in a second fraction reaching concentration factors between 1.5 to 2.5 times while observing low level of erythritol losses (<2%), with an energy consumption of 4.10 kWh/m3.
Keywords: electrodialysis; erythritol downstream; Desalination; waste reduction; current efficiency
DOI: 10.3390/su14020734
Organisation: E226-01 - Forschungsbereich Wassergütewirtschaft 
License: CC BY 4.0 CC BY 4.0
Publication Type: Article
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