Effect of some operating variables on citrate recovery from model solutions by electrodialysis

✍ Scribed by Mauro Moresi; Fabiana Sappino

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 154 KB
• Volume: 59
• Category: Article
• ISSN: 0006-3592
• DOI: 10.1002/(sici)1097-0290(19980805)59:3<344::aid-bit10>3.0.co;2-e

✦ Synopsis

The effect of pH and temperature () on the overall performance indicators (i.e., solute recovery, , and Faraday, , efficiencies; specific energy consumption, , solute, J S , and water, J W , fluxes) of batch electrodialytic recovery of citric acid from model solutions was assessed at different values of feed solute concentration (c Sf ) and electric current density (j). Regardless of the initial feed concentration used, and J S were found to be independent of ; and J W exhibited a positive trend with respect to , while a negative one. At the maximum temperature tested (33°C), as the pH of the feed solution was varied from 3 to 7, increased from 0.90 ± 0.08 to 0.97 ± 0.02, grew from 0.09 ± 0.02 to 0.50 ± 0.01, J S practically doubled, reduced about 8 times, but J W increased from 3 to 4 times. So, the optimal conditions for this technique are to be determined by balancing the savings in the investment and maintenance costs against the energy costs.