electrochem advanced electrodialysis project and results: treatment of scaling mine waters
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ElectroChem RO Brine Concentrator for Treating Mining Waters
www.saltworkstech.com
Copyright © 2015 Saltworks Technologies Inc.
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Mining Water Treatment & TechnologyThe Project:
Treat mine run-off and tailings waters at active mine sites for extreme recoveries (low brine volumes), low cost, and less chemicals (no lime softening)
Full scale commercial modules employed @ site Meet discharge requirements including fish mortality tests Four pilots: all successful in meeting reliability and economic
objectivesThe ElectroChem RO Brine Concentrator Technology:
Proven electrodialysis technology with electrode protectionHybridize with reverse osmosis for high recoveryChemical free treatment Robust IonFlux Ion Exchange Membrane
Copyright © 2015 Saltworks Technologies Inc.
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• Based on well established electrodialysis (EDR) technology: 50 years of implementations
• Saltworks’ patented electrode fouling protection• Low pressure operation (<20 psi)• Self “cleaning” through reversal• Desalt to any concentration• Removal of multivalent ions• Modular
Copyright © 2015 Saltworks Technologies Inc.
Saltworks Modular ElectroChem RO Brine Concentrator Stack
ElectroChem RO Brine Concentrator
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Conc
entr
ate
~80K
ppm
Prod
uct
Conc
entr
ate
Prod
uct
Conc
entr
ate
Elec
trol
yte
Anod
e
+-
+-
+
Prod
uct
~5K
ppm
Elec
trol
yte
-+
Cath
ode
Conc
entra
te~8
0K p
pm
Prod
uct
Conc
entr
ate
Prod
uct
Conc
entr
ate
Elec
trol
yte
Anod
e
Prod
uct
~5K
ppm
Elec
trol
yte
-+
Cath
ode
-+
-++
ElectroChem RO Brine Concentrator Stack Self Cleaning
Forward Mode
Reverse Mode
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Ductile and conductive base polymer
pH 0-12, 0-60oC
1/10th thickness of traditional membranes, but tougher and smoother (less fouling potential)
High multivalent ion transport, high selectivity
Selective ion removal
Copyright © 2015 Saltworks Technologies Inc.
IonFlux Ion Exchange Membrane
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ElectroChem - Chemical Free Softening
Copyright © 2015 Saltworks Technologies Inc.
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Feed Fresh water (RO permeate)
ElectroChem(softening)
ReverseOsmosis (RO)
SalttransferPre-
treatment
RO reject
Brine discharge
Leverage RO strengths, overcome drawbacks ElectroChem softens RO inlet and concentrates RO reject Typical 50% RO reject volume reduction over lime-RO Increased RO reliability – RO operates mostly on NaCl Remove or reduce lime softening
ElectroChem RO Brine Concentrator
ElectroChem RO Brine Concentrator
Copyright © 2015 Saltworks Technologies Inc.
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Plant Feed 22,100 mg/L TDS concentrated to 106,800 mg/L
ElectroChem RO Brine Concentrator
Copyright © 2015 Saltworks Technologies Inc.
106,800 mg/L
46,800 mg/L
5,180 mg/L
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Commercial Production & Services 15,000 ft2 ElectroChem RO Brine Concentrator development,
production, and support facility
Customer Training CenterQuality Assurance 24/7 Remote Customer Support
Copyright © 2015 Saltworks Technologies Inc.
ElectroChem Brine Concentrator Stack Production and Assembly
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Project Technology ObjectiveCoal Runoff EDR-RO Selenium, heavy metalsZinc Tailings EDR Heavy metalsCopper Tailings EDR Sulfates, heavy metalsOil Sands Mining EDR-RO Brackish mine water
Mine Water Treatment Projects
Micro Stack Micro Pilot Modular Full-Scale Stack
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ElectroChem RO Brine Concentrator Pilot
Copyright © 2015 Saltworks Technologies Inc.
Multimedia Filtration Microfiltration Containerized Plant Automated Controls
Up to 50 m3/day containerized plant Pre-treatment: clarification, media filters, MF, UF Desalination: ElectroChem RO Brine Concentrator Automated: data acquisition, self cleaning, auto start/stop
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ElectroChem RO Brine Concentrator achieved 80% recovery Lime-RO achieved 60% recovery
Reliable Operation & High Recovery
Copyright © 2015 Saltworks Technologies Inc.
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Coal Mine: Met All Discharge Limits
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Zinc Tailings: TDS Results
Copyright © 2015 Saltworks Technologies Inc.
Technology: ElectroChem RO Brine Concentrator
Parameter TDS (mg/L)
Raw water 5,440
Discharge Goal < 1,500
Parameter TDS (mg/L)
Brine 13,200
Freshwater 1,200
Recovery 66%
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Copper Tailings: TDS Results
Copyright © 2015 Saltworks Technologies Inc.
Technology: ElectroChem Wastewater Desalter
Parameter TDS (mg/L)
Raw water 2,460
Discharge Goal < 1000 (SO4 < 500)
Parameter TDS (mg/L)
Brine 9,730
Freshwater 700
Recovery 81%
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• Contact us with your project needs: [email protected]
• Desktop studies (free), pilots, full scale plants: we deliver them all
YOUR PROJECT?
Copyright © 2015 Saltworks Technologies Inc.
ElectroChem RO Brine Concentrator
Micro Stack ElectroChem RO Brine Concentrator Micro Pilot
ElectroChem RO Brine Concentrator Full-Scale ElectroChem Stack