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Statements

Subject Item
n2:RIV%2F46747885%3A24620%2F14%3A%230000665%21RIV15-MSM-24620___
rdf:type
skos:Concept n16:Vysledek
rdfs:seeAlso
http://www.ecostp.org/
dcterms:description
The possibilities for salt recovery from industrial brines by a coupled nanofiltration - membrane distillation (NF-MD) process are illustrated in this paper by two case studies i.e. the recovery of water and chloride salts from Ion Exchange (IEX) regenerate and from zinc ore refinery wastewater. Ion exchange based demineralization of tap water for the preparation of process water results in a saline regeneration wastewater. Techno-economical evaluation shows that NF-MD on this wastewater is economically feasible for midsized and larger scale demineralization plants (200 to 2000 m3/day demineralized water) but only when discharge is prohibitively expensive or not allowed. Scaling is found to be a main bottleneck for NF-MD. It is therefore concluded that further physicochemical pretreatment is required to improve the process. The cost benefits of water reuse (1.5% to 3.2%) and salt recuperation (0.16% to 0.36%) are small when compared to the overall treatment cost. The main benefits are reduced discharge of chlorides and cost reduction for middle sized (43%) and larger installations (47%) in comparison to the cost of external wastewater disposal. An important step in the production of secondary zinc oxides is the washing of zinc oxide to remove chlorides and fluorides. During this washing step, a chloride rich waste stream is generated. A valorisation of this chloride rich waste stream is desired both to improve local environmental conditions and to allow increased zinc production capacity currently limited by chloride load based discharge limitations. Nanofiltration is able to remove the major part of the metals present in the feed stream. During membrane distillation of the NF permeate no scaling issues were experienced. The final brine can be evaporated to a salt containing 45.9 % NaCl and 54 % KCl. The possibilities for salt recovery from industrial brines by a coupled nanofiltration - membrane distillation (NF-MD) process are illustrated in this paper by two case studies i.e. the recovery of water and chloride salts from Ion Exchange (IEX) regenerate and from zinc ore refinery wastewater. Ion exchange based demineralization of tap water for the preparation of process water results in a saline regeneration wastewater. Techno-economical evaluation shows that NF-MD on this wastewater is economically feasible for midsized and larger scale demineralization plants (200 to 2000 m3/day demineralized water) but only when discharge is prohibitively expensive or not allowed. Scaling is found to be a main bottleneck for NF-MD. It is therefore concluded that further physicochemical pretreatment is required to improve the process. The cost benefits of water reuse (1.5% to 3.2%) and salt recuperation (0.16% to 0.36%) are small when compared to the overall treatment cost. The main benefits are reduced discharge of chlorides and cost reduction for middle sized (43%) and larger installations (47%) in comparison to the cost of external wastewater disposal. An important step in the production of secondary zinc oxides is the washing of zinc oxide to remove chlorides and fluorides. During this washing step, a chloride rich waste stream is generated. A valorisation of this chloride rich waste stream is desired both to improve local environmental conditions and to allow increased zinc production capacity currently limited by chloride load based discharge limitations. Nanofiltration is able to remove the major part of the metals present in the feed stream. During membrane distillation of the NF permeate no scaling issues were experienced. The final brine can be evaporated to a salt containing 45.9 % NaCl and 54 % KCl.
dcterms:title
Recovering Salts from Industrial Brines by Nf-md: Case Studies on IEX Regeneration Wastewater and Chloride Rich Wash Water from a Zinc Ore Refinery Recovering Salts from Industrial Brines by Nf-md: Case Studies on IEX Regeneration Wastewater and Chloride Rich Wash Water from a Zinc Ore Refinery
skos:prefLabel
Recovering Salts from Industrial Brines by Nf-md: Case Studies on IEX Regeneration Wastewater and Chloride Rich Wash Water from a Zinc Ore Refinery Recovering Salts from Industrial Brines by Nf-md: Case Studies on IEX Regeneration Wastewater and Chloride Rich Wash Water from a Zinc Ore Refinery
skos:notation
RIV/46747885:24620/14:#0000665!RIV15-MSM-24620___
n3:aktivita
n4:P
n3:aktivity
P(ED0005/01/01)
n3:dodaniDat
n13:2015
n3:domaciTvurceVysledku
n18:9926585
n3:druhVysledku
n22:D
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n5:predkladatel
n3:idSjednocenehoVysledku
41643
n3:idVysledku
RIV/46747885:24620/14:#0000665
n3:jazykVysledku
n19:eng
n3:klicovaSlova
Resource recovery; membrane distillation; nanofiltration; NF-MD; brine; chloride; regenerate
n3:klicoveSlovo
n9:chloride n9:membrane%20distillation n9:Resource%20recovery n9:nanofiltration n9:brine n9:NF-MD n9:regenerate
n3:kontrolniKodProRIV
[D86EE809505B]
n3:mistoKonaniAkce
Verona, Italy
n3:mistoVydani
Verona, Italy
n3:nazevZdroje
EcoTechnologies for Wastewater Treatment
n3:obor
n15:CI
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
4
n3:projekt
n21:ED0005%2F01%2F01
n3:rokUplatneniVysledku
n13:2014
n3:tvurceVysledku
DeSchepper, Wim Cauwenberg, Peter Sankar, J. S. Jiříček, Tomáš
n3:typAkce
n17:EUR
n3:zahajeniAkce
2014-01-01+01:00
s:numberOfPages
5
n14:hasPublisher
IWA
n11:isbn
9788869250026
n10:organizacniJednotka
24620