Concentrate and permeate treatment processes for improving the sustainability of inland brackish water desalination W. Shane Walker, Ph.D. Anthony Tarquin, Ph.D. Center for Inland Desalination Systems The University of Texas at El Paso Multi-State Salinity Coalition Summit Las Vegas, Nevada January 26, 2012
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Concentrate and permeate treatment processes for improving the sustainability of inland brackish water desalination W. Shane Walker, Ph.D. Anthony Tarquin,
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Concentrate and permeate treatment processes for improving the sustainability
of inland brackish water desalinationW. Shane Walker, Ph.D.Anthony Tarquin, Ph.D.
Center for Inland Desalination SystemsThe University of Texas at El Paso
• Review indicators of sustainability• Highlight several CIDS investigations
demonstrating improved sustainability
Sustainability
Environmental
EconomicSocio-Political
Environmental
EconomicSocio-Political
Select Sustainability Indicators
• Higher water recovery (product/feed)• Lower specific energy consumption (kWh/kgal)• Less chemical consumption, waste production• Lower economic cost ($/kgal; $/MGD)• Technical/operational complexity
Inland Membrane Desalination
Brackish Water Source
pretreatment membrane process
concentrate treatment
permeate treatment
Distribution
Reuse/Disposal
Permeate Treatment
Brackish Water Source
pretreatment membrane process
concentrate treatment
permeate treatment
Distribution
Disposal
Permeate Stabilization by Calcite
Three-step process1. Lower pH with CO2
– Relatively abundant and inexpensive gas
2. CO2 reacts with calcite– CO2 + CaCO3 → Ca2+ + 2 HCO3-
3. Add small dose of base for LSI > 0
Carollo Engineers, Inc. and Shane Walker, UTEPTexas Water Development Board (1004831105)
Tom Davis & Malynda Cappelle, UTEPUS Bureau of Reclamation, DWPR R10AP81212
Conclusions
Sustainability of inland brackish water desalination can be improved by:– increasing system recovery– reducing specific energy consumption– reducing chemical consumption and production– reducing economic cost– designing appropriate technical complexity
Acknowledgements
• Permeate Stabilization by Calcite– Texas Water Development Board– El Paso Water Utilities, KBH Desalination Plant– Carollo Engineers: Winnie Shih, Bradley Sessions, Justin Sutherland– UTEP CIDS: Luis Maldonado, Cora Martinez, Sami Al-Haddad
• CERRO (High Recovery)– US Bureau of Reclamation, BGNDRF (Alamogordo, NM)– UTEP CIDS: Anthony Tarquin, Guillermo Delgado
• ZDD (High Recovery)– US Bureau of Reclamation, BGNDRF (Alamogordo, NM)– UTEP CIDS: Tom Davis, Malynda Cappelle, Lucy Camacho,
Noe Ortega, Jesse Valles
Questions or Comments
W. Shane Walker, Ph.D.Assistant ProfessorThe University of Texas at El Paso500 W. University Ave., Civil EngineeringEl Paso, TX 79968(915) [email protected]