Étude comparative des procédés d'électrodialyse et d'électrodéionisation : application à la fabrication d'acide lactique

Abstract : This work deals with the comparative study of electrodialysis and electrodeionization. The possibilities to integrate the electro-membrane processes in the lactic acid fermentive production lines are investigated. Two main research ways are chosen : the first one lies in the continuous extraction of natrium lactate out of the fermentation middle. For this, an electrodialysis stack of only anionic membranes is coupled with the fermenter : approximately 95 % of lactate are removed during the operation. By comparison with a standard fermentation in batch mode, no inhibition is observed, and the productivity is increased by 13. The second way is to convert the natrium lactate in lactic acid : a high purity rate is seeked. A continuous electrodeioniation process including bipolar membranes, leading to 99,9% conversion rate, is elaborated for the treatment of diluted solutions. Finally is presented the mathematic calculation of an electrodeionization compartment : experimental points and calculated values are very similar
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https://hal.univ-lorraine.fr/tel-01754524
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Frédéric Schab. Étude comparative des procédés d'électrodialyse et d'électrodéionisation : application à la fabrication d'acide lactique. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2007. Français. ⟨NNT : 2007INPL035N⟩. ⟨tel-01754524⟩

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