Recovery of salts from ion-exchange regeneration streams by a coupled nanofiltration–membrane distillation process
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F15%3A00002148" target="_blank" >RIV/46747885:24620/15:00002148 - isvavai.cz</a>
Result on the web
<a href="http://apps.webofknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=1&SID=W2Jog277KdHVQJ5TFVt&page=1&doc=1" target="_blank" >http://apps.webofknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=1&SID=W2Jog277KdHVQJ5TFVt&page=1&doc=1</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.2166/wst.2015.215" target="_blank" >10.2166/wst.2015.215</a>
Alternative languages
Result language
angličtina
Original language name
Recovery of salts from ion-exchange regeneration streams by a coupled nanofiltration–membrane distillation process
Original language description
Ion-exchange tap water demineralization for process water preparation results in a saline regeneration wastewater (20–100 mS cm-1) that is increasingly problematic in view of discharge. A coupled nanofiltration–membrane distillation (NF-MD) process is evaluated for the recovery of water and sodium chloride from this wastewater. NF-MD treatment of mixed regeneration wastewater is compared to NF-MD treatment of separate anion- and cation-regenerate fractions. NF on mixed regeneration wastewater results in a higher flux (30 L m-2 h-1 at 7 bar) compared to NF on the separate fractions (6–9 Lm-2 h-1 at 30 bar). NF permeate recovery is strongly limited by scaling (50% for separate and 60% for mixed, respectively). Physical signs of scaling were found during MD treatment of the NF permeates but did not result in flux decline for mixed regeneration wastewater. Final salt composition is expected to qualify as a road de-icing salt. NF-MD is an economically viable alternative compared to external disposal of wastewater for larger-scale installations (1.4 versus 2.5 euro m-3 produced demineralized water for a 10 m3 regenerate per day plant). The cost benefits of water re-use and salt recuperation are small when compared to total treatment costs for mixed regenerate wastewater.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Water Science and Technology
ISSN
0273-1223
e-ISSN
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Volume of the periodical
72
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
252-259
UT code for WoS article
000358048500011
EID of the result in the Scopus database
2-s2.0-84937131021