assessment of brackish groundwater desalination for ...assessment of brackish groundwater...
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![Page 1: Assessment of Brackish Groundwater Desalination for ...Assessment of Brackish Groundwater Desalination for Municipal and Industrial Water Supply in Santa Teresa, New Mexico Project](https://reader035.vdocument.in/reader035/viewer/2022071110/5fe5a996391d2941db72d652/html5/thumbnails/1.jpg)
Assessment of Brackish Groundwater Desalination for Municipal and Industrial
Water Supply in Santa Teresa, New Mexico
Project team: Drs. Phil King, Pei Xu, Brian H. Hurd, KC Carroll,Dr. David Johnson, Xuesong Xu, Alfredo Z. Rodriguez
Project partners: Border Industrial Association (BIA)Camino Real Regional Utility Authority (CRRUA)Dr. John W. Hawley, N.M. Bureau of Geol.& Miner. Res.Universidad Autónoma de Chihuahua
Cooperative Agreement Project between NMSU and U.S. BoRStakeholder Meeting, October 24, 2017
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• Santa Teresa is a bright spot for economic development• Land Port of Entry to Mexico• Union Pacific intermodal transportation facility• Growing industry base
• Need sustainable water infrastructure
Research Background
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• Investigate the hydrogeologic, technical and economic potential for desalinating brackish groundwater in the Santa Teresa-San Jeronimo area
• Conduct a proof-of-concept demonstration with a pilot desalination plant and existing brackish wells
• Develop an organizational and financial plan for moving forward with desalination implementation
Research Objectives
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Research Updates• Working with local entities to assess water demand, current supply, and
binational potential• Developed dialog with Universidad Autónoma de Chihuahua’s Department
of Civil Engineering colleagues as project collaborators
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Research Updates• Conducted literature review on geophysics- and geochemistry-based
assessment of the Mesilla Basin (Teeple (USGS), 2017)
– Dissolved-solids-concentration data collected during 1922–2007 for 239 wells with water depth from 0-1,750 ft
– The TDS concentrations in the northern part were generally less than 1,000 mg/L– In the southern part, TDS concentrations > 1,000 mg/L were common, but 3,000 –
35,000 mg/L water were found especially with increasing depth
Water Depth: A, 0 feet. B, 250 feet. C, 500 feet. D, 750 feet
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Research Updates• Conducted literature review on geophysics- and geochemistry-based
assessment of the Mesilla Basin (Teeple, 2017)
– Dissolved-solids-concentration data collected during 1922–2007 for 239 wells with water depth from 0-1,750 ft
– The TDS concentrations in the northern part were generally less than 1,000 mg/L– In the southern part, TDS concentrations > 1,000 mg/L were common, but 3,000 –
35,000 mg/L water were found especially with increasing depth
Water Depth: E, 1,000 feet. F, 1,250 feet. G, 1,500 feet. H, 1,750 feet
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Research Updates
• Of the 44 groundwater samples collected, 82% represented Na-dominated water types, specially Na-Cl-SO4 or Na-HCO3 water types, with the Na-Cl-SO4 water type being the most common (70.5%).
• 18.2% near the Mesilla Valley Fault zone represented Ca-Cl-SO4 or Ca-HCO3 water types
• Conducted literature review on geophysics- and geochemistry-based assessment of the Mesilla Basin (Teeple, 2017)
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Research Updates
• Conducted water quality analyses for five groundwater samples from the southern part of the Mesilla Basin– Found elevated As (7-25 ug/L), Na (270-610 mg/L), TDS (900-2600
mg/L), and high spatial variability
• Conducted literature review on geophysics- and geochemistry-based assessment of the Mesilla Basin (Teeple, 2017)
– Combined nitrate plus nitrite (NO3+NO2) < 8.38 mg/L– Sparingly soluble salts may cause scaling, e.g., silica concentration
between 14.5 mg/L and 85.1 mg/L – Below detection limit of selected pesticides
Desalination is needed to produce safe drinking water and sustain the economic development!
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Pilot Test/Demo Updates• Acquired pilot-scale test units from NMSU• Testing pilot-scale desalination system using reverse osmosis (RO) and
nanofiltration (NF) membranes
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Future Research Tasks• Assessment of demand • Assessment of the brackish water resource for supply
and disposal• Characterization of hydrologic connection with Rio
Grande system• Treatment technology and proof-of-concept field
demonstration• Binational potential
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Reference
Teeple, A. P., 2017. Geophysics- and geochemistry-based assessment of the geochemical characteristics and groundwater-flow system of the U.S. part of the Mesilla Basin/Conejos-Médanos aquifer system in Doña Ana County, New Mexico, and El Paso County, Texas, 2010–12. Scientific Investigations Report 2017-5028, prepared in cooperation with the Bureau of Reclamation.
https://pubs.er.usgs.gov/publication/sir20175028