Performance of a novel electrodeionization technique during citric acid recovery

Widiasa, I.N. and Sutrisna, P.D. and Wenten, I.G. (2004) Performance of a novel electrodeionization technique during citric acid recovery. Separation and Purification Technology, 39 (1-2). pp. 89-97. ISSN 1383-5866

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Official URL: http://dx.doi.org/10.1016/j.seppur.2003.12.020

Abstract

This paper concerns with the behavior of an electrodeionization (EDI) system for concentration of citric acid from fermentation broth. Commercially cation-exchange membrane (MC-3470) and anion-exchange membrane (MA-3475) were used as ionic selective barriers of the EDI stack. The diluted compartments of the EDI stack were filled with mixed ion-exchange resins (purolite strong acid cation-exchange, C-100E and strong base type I anion resins, A-400). The experiment used feeds with citric acid concentration in the range of 500–10,000 ppm and feed flow rate in the range of 1–4 l h−1. The V–I characteristics indicated that there were essential differences in current transport and electrical resistance between the EDI and the electrodialysis (ED) processes. Moreover, the overall current efficiency was in the range of 40–96% and has been found to be a function of feed concentration and current density. The performance of the EDI system was also stable during 24 h operation.

Item Type:Article
Subjects:Q Science > Q Science (General)
T Technology > TP Chemical technology
Divisions:Faculty of Engineering > Department of Chemical Engineering
Faculty of Engineering > Department of Chemical Engineering
ID Code:167
Deposited By:Dr. Istadi I.
Deposited On:09 May 2009 14:02
Last Modified:09 May 2009 14:02

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