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Production processes of fermented organic acids targeted around membrane operations: design of the concentration step by conventional electrodialysis

Bailly, Mathieu and Roux-de Balmann, Hélène and Aimar, Pierre and Lutin, Florence and Cheryan, Munir Production processes of fermented organic acids targeted around membrane operations: design of the concentration step by conventional electrodialysis. (2001) Journal of Membrane Science, 191 (1). 129-142. ISSN 0376-7388

(Document in English)

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Official URL: http://dx.doi.org/10.1016/S0376-7388(01)00459-8


Organic acids are increasingly used for various industrial applications. Their production is mainly achieved by fermentation. Precipitation or extraction stages, which generate big amount of effluents, are then traditionally used to get the acid in a suitable form. To lower the impact on the environment, the implementation of cleaner operations are investigated. In this context, a complete process targeted around membrane operations for clarification, concentration and conversionwas studied. The present paper is devoted to the study of the concentration step, carried out by conventional electrodialysis (EDC). A model, based on the description of the solute and solution fluxes through the membranes is developed. Dedicated procedures are proposed to determine the different contributions, i.e. electromigration and diffusion, to these fluxes so as to feed the model. This approach is then applied to the concentration of sodium lactate solutions. The preponderance of electromigration is thus demonstrated as well as the existence of a maximum achievable concentration, the predicted value of which is confirmed experimentally. Comparison between EDC of sodium and ammonium lactate solutions shows that the counter ion has negligible influence on the transport of lactate. The influence of the membrane characteristics is also drawn from comparison with previously published results. Finally, the predictions of the model are compared with the experimental results concerning the concentration of a fermentation broth and a good agreement is stated. The approach proposed in this paper can be used as well to design EDC concentration of any other organic acid salt than lactate.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Membrane Science website: http://www.elsevier.com/wps/find/journaldescription.cws_home/502692/description#description
HAL Id:hal-03604694
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > EURODIA Industrie (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Illinois at Urbana-Champaign - UIUC (USA)
Laboratory name:
Deposited On:25 Jun 2009 15:13

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