Recovery of salts from ion-exchange regeneration streams by a coupled nanofiltration–membrane distillation process

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Recovery of salts from ion-exchange regeneration streams by a coupled nanofiltration–membrane distillation process

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Recovery of salts from ion-exchange regeneration streams by a coupled nanofiltration–membrane distillation process

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Water Science and Technology

ISSN

0273-1223

e-ISSN

—

Svazek periodika

72

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

252-259

Kód UT WoS článku

000358048500011

EID výsledku v databázi Scopus

2-s2.0-84937131021