Anion exchange membrane organic fouling and mitigation in salt valorization process from high salinity textile wastewater by bipolar membrane electrodialysis

Berkessa, Y, Lang, Q, Yan, B, Kuang, S, Mao, D, Shu, L and Zhang, Y 2019, 'Anion exchange membrane organic fouling and mitigation in salt valorization process from high salinity textile wastewater by bipolar membrane electrodialysis', Desalination, vol. 465, pp. 94-103.


Document type: Journal Article
Collection: Journal Articles

Title Anion exchange membrane organic fouling and mitigation in salt valorization process from high salinity textile wastewater by bipolar membrane electrodialysis
Author(s) Berkessa, Y
Lang, Q
Yan, B
Kuang, S
Mao, D
Shu, L
Zhang, Y
Year 2019
Journal name Desalination
Volume number 465
Start page 94
End page 103
Total pages 10
Publisher Elsevier
Abstract To achieve a cleaner production, textile wastewater with high organic and salt content can be treated by using Bipolar Membrane Electrodialysis (BMED)to minimize acid and base consumption in a dyeing process. While the dye molecules may foul the ion exchange membranes and strongly affect the desalination process. This work aimed to investigate the performance and fouling mechanisms of BMED during desalination of sodium sulfate from Remazol Brilliant Blue R (RBBR). Results showed that maintaining the zeta potential of RBBR above −25 mV may mitigate fouling of AEM during the BMED process. This confirms that, zeta potential of charged foulants (RBBR)plays a key role in terms of controlling membrane fouling. Accordingly, a new parameter critical salt concentration was introduced to control membrane fouling. Furthermore, energy dispersive X-ray spectroscopy (EDS), FT-IR and electrochemical analysis confirmed that fouling of anion exchange membrane by RBBR was due to electrostatic interaction. Finally, it was calculated that 72.02% of sodium and 66.9% of sulfate in the feed were converted to NaOH and H 2 SO 4 , respectively. This study proves that BMED process may be an alternative way treating textile wastewater with high salinity and the presence of dye molecules.
Subject Water Treatment Processes
Keyword(s) Bipolar membrane electrodialysis
Charged foulants
Critical salt concentration
Membrane fouling
Textile wastewater
Zeta potential
DOI - identifier 10.1016/j.desal.2019.04.027
Copyright notice © 2019 Published by Elsevier B.V.
ISSN 0011-9164
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