Application of electrodialysis for lactic acid recovery

V. Hábová, K. Melzoch, M. Rychtera, L. Přibyl and V. Mejta
Additional contact information
V. Hábová: Institute of Chemical Technology, Prague Department of Fermentation Chemistry and Bioengineering
K. Melzoch: Institute of Chemical Technology, Prague Department of Fermentation Chemistry and Bioengineering
M. Rychtera: Institute of Chemical Technology, Prague Department of Fermentation Chemistry and Bioengineering
L. Přibyl: Institute of Chemical Technology, Prague Department of Fermentation Chemistry and Bioengineering
V. Mejta: Institute of Chemical Technology, Prague Department of Fermentation Chemistry and Bioengineering

Czech Journal of Food Sciences, 2001, vol. 19, issue 2, 73-80

Abstract: The paper deals with the possibility of using two-stage electrodialysis for recovery of lactic acid from model solutions and from fermentation broth. In the first step lactate was concentrated with desalting electrodialysis using ion exchange membranes Ralex (Mega,Czech Republic). The highest final concentration of 111 g/l was reached in the concentrate, it means an increase more than 2.5-times in comparison with the initial concentration. At the most 2 g of lactate per litre remained in the feed. The second step was the electroconversion of sodium lactate to lactic acid by water-splitting electrodialysis with the bipolar membranes Neosepta (Tokuyama Corp.,Japan). The final lactic acid concentration of 157 g/l was reached in the diluate. Total required energy in both electrodialysis processes consisting of the energy consumption for lactate transfer and for its electroconversion to lactic acid was 142 Wh/mol. The fermentation broth was decolourised before electrodialysis experiments. The best decolourisation capacity was shown by granulated active charcoal filled in the column operated by a slow flow of broth.

Keywords: lactic acid recovery; electrodialysis; desalting electrodialysis; water-splitting electrodialysis; decolourisation (search for similar items in EconPapers)
Date: 2001
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://cjfs.agriculturejournals.cz/doi/10.17221/6579-CJFS.html (text/html)
http://cjfs.agriculturejournals.cz/doi/10.17221/6579-CJFS.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:19:y:2001:i:2:id:6579-cjfs

DOI: 10.17221/6579-CJFS

Access Statistics for this article

Czech Journal of Food Sciences is currently edited by Ing. Zdeňka Náglová Ph.D.

More articles in Czech Journal of Food Sciences from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().