Effects of polarity reversal on electrodialysis performance at high concetrations
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F19%3AN0000037" target="_blank" >RIV/28676092:_____/19:N0000037 - isvavai.cz</a>
Result on the web
<a href="http://www.czemp.cz/cs/workshop-students-presentation-fulltexts/wsp-2019-fulltexty" target="_blank" >http://www.czemp.cz/cs/workshop-students-presentation-fulltexts/wsp-2019-fulltexty</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Effects of polarity reversal on electrodialysis performance at high concetrations
Original language description
To avoid scale development, which has a negative impact on electrodialysis (ED) performance, the principle of reversing polarity is commonly applied. However, there is not much known about the effects of polarity reversal at high concentrations of inorganic salts. Feed-and-bleed experiments at constant voltage were undertaken on a laboratory-scale ED stack using a system of sodium sulphate, sodium carbonate and magnesium sulphate with the aim of determining the influence of polarity reversal and its frequency on magnesium carbonate scaling. Prior to these experiments, the composition of process streams was optimized using simple batch precipitation in order to find conditions characterizing the beginning of membrane scaling. This study showed that without reversal, current density decreased rapidly after approximately 230 minutes. Polarity reversal every two hours did not show any improvement, however, one hour period between reversals resulted in constant current density for more than 350 minutes suggesting that the ED performance should be maintained. These findings imply positive effect of polarity reversal on ED for treatment of highly concentrated solutions and should be applied in further scale-up considerations.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20402 - Chemical process engineering
Result continuities
Project
<a href="/en/project/FV40062" target="_blank" >FV40062: Zero liquid discharge of industrial waste water using electrodialysis</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Workshop of Students Presentations 2019
ISBN
978-80-906831-9-8
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
14
Publisher name
Czech Membrane Platform
Place of publication
Praha
Event location
Stráž pod Ralskem
Event date
Oct 16, 2019
Type of event by nationality
CST - Celostátní akce
UT code for WoS article
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