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Phil Brandhuber PhD HDR Engineering Karla Kinser PE MWH Colorado ZLD Pilot An Update.

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Presentation on theme: "Phil Brandhuber PhD HDR Engineering Karla Kinser PE MWH Colorado ZLD Pilot An Update."— Presentation transcript:

1 Phil Brandhuber PhD HDR Engineering Karla Kinser PE MWH Colorado ZLD Pilot An Update

2 Concentrate Disposal Options Surface water body Municipal sewer Deep well injection Land application Evaporation pond Brine minimization/zero liquid discharge

3 Project Update Colorado Project - Demonstration of Membrane Zero Liquid Discharge for Drinking Water Systems Pilot test brine minimization technologies at two locations in Colorado Poster at this conference last year Today discuss technology assessment and selection process.

4 What Minimization Technologies are Available? Thermal Pressure Driven Electric Potential Alternative

5 TechnologyClaimed Overall Recovery Comments Brine Concentrator 90% to 95% Mature technology High capital and energy cost Brine Crystallizer Up to 98% Mature technology High capital and energy cost Spray Dryers None Seasonal use Low capital Energy usage similar to brine concentrator Thermal Technologies

6 Pressure Driven Technologies TechnologyClaimed Overall Recovery Comments Dual RO with Intermediate Chemical Demineralization 90% - 98% Combination of mature technologies. Increased chemical dosage and sludge disposal required. Dual RO with Pellet Softener (PS) or Fluidized Bed Crystallizer (FBC) 90% - 98% Combination of mature technologies. Increased chemical dosage and sludge disposal required. Seeded Slurry Precipitation and Recycle (SPARRO) 90% - 95% Proprietary technology. Limited full-scale applications for municipal water treatment.

7 TechnologyClaimed Overall Recovery Comments High Efficiency RO (HERO) 95% - 99% Proprietary technology. High capital and O&M cost High Efficiency Electro- Pressure Membrane (HEEPM) 95% - 99% Proprietary technology. No applications for municipal water treatment. Advanced Reject Recovery of Water (ARROW) Up to 95% Proprietary technology. No applications for municipal water treatment. Optimized Pretreatment and Separation (OPUS) 90% - 98% Proprietary technology. High capital and O&M cost. Pressure Driven Technologies

8 TechnologyClaimed Overall Recovery Comments Vibratory Shear Enhanced Process (VSEP) Up to 90% Proprietary technology. Insufficient capacity for municipal water treatment. Dist Tube (DT) Filtration Up to 93% Proprietary technology. No applications for municipal water treatment.

9 Electric Potential Driven Technologies TechnologyClaimed Overall Recovery Comments Electrodialysis (ED) and Electrodialysis Reversal (EDR) Up to 95% Effective for high silica content. Limited effectiveness with high calcium sulfate saturation Electrodialysis Metathesis (EDM) Up to 98% Effective for high silica content. Effective for operation of water with high calcium sulfate saturation.

10 Advanced Technologies TechnologyClaimed Overall Recovery Comments Forward Osmosis (FO)Up to 90% Emerging technology. High energy efficiency. Membrane Distillation (MD) Up to 90% Emerging technology. No applied pressure. DewvaporationUp to 80% Emerging technology. No applied pressure. Eutectic Freeze Crystallization Up to 97% Emerging technology. No applied pressure.

11 Technologies Selected for Detailed Evaluation Membrane-based - Dual Reverse Osmosis with Intermediate Demineralization Electric Potential-based - Electrodialysis Metathesis (EDM)

12 Electrodialysis Metathesis (EDM)

13 Dual RO with Intermediate Treatment Brine Concentrator Concentrate Groundwater Permeate Primary RO Secondary RO 50 m Bag Filter Hold Tank Cartridge Filter Overflow LP Pump HP Pump Booster Pump Antiscalant Intermediate Treatment ChemicalsAntiscalant Sand Filter Acid Sludge Evaporation Pond Distillate

14 Implementation of EDM for Brine Minimization

15 Water Quality Overview ParameterUnits Brighton (raw) Brighton (concentrate 80% recovery) La Junta (raw) La Junta (concentrate 75% recovery) Calcium (Ca ++ )mg/L1075331811065 Magnesium (Mg ++ )mg/L2412060353 Sodium (Na + )mg/L121605103606 Potassium (K + )mg/L4.321529 Iron (Fe +++ )mg/L0.050.25 Total Manganese (Mn)mg/L0.130.650.6 Barium (Ba ++ )mg/L0.060.30.050.29 Strontium (Sr ++ )mg/L1.26.07.645 Aluminum (Al)mg/L0.0020.01 Chloride (Cl - )mg/L125818128753 Sulfate (SO 4 -- )mg/L21310655463211 Bicarbonate (HCO 3 - )mg/L179 (alkalinity) 8952181288 Nitrate (NO 3 - )mg/L as N4.522.42.313.5 Fluoride (F - )mg/L14.93.511 Silica (SiO 2 )mg/L SiO 2 1996.257.544 Phosphate (PO 4 --- )mg/L PO 4 0.271.33 TDSmg/L634426012587419 pHunits7.027.717.68.4 Conductivity(μS/cm)1218638211414 Temperature(F)6259

16 Modeling Results - RO Based Train Parameter Degrees of Saturation in Concentrate as % Brighton (Concentrate treated at 53% recovery) La Junta (Concentrate treated at 39% recovery) No Inhibitor MSI310 No Inhibitor MDC151 CaSO 4 133.653.5343.498.1 BaSO 4 6362.197.97572.272.1 SrSO 4 71.32.4646.818.5 CaF 2 5248.70.419570.61.5 SiO 2 163.385.342.5 CaPO 4 172.6 CaCO 3 94.491.0 No Intermediate Treatment Parameter Degrees of Saturation in Concentrate as % Brighton (Concentrate treated at 81% recovery) La Junta (Concentrate treated at 67% recovery) No Inhibitor MSI310 No Inhibitor MDC151 CaSO 4 148.042.3349.799.9 BaSO 4 7783.574.16705.863.9 SrSO 4 211.06.01353.438.7 CaF 2 19045.61.544549.23.4 SiO 2 96.1 50.4 CaPO 4 189.1101.8 CaCO 3 82.398.0 With Intermediate Treatment

17 Summary of Detailed Evaluation Brine Treatment Process BrightonLa Junta Brine Treatment Recovery Overall Recovery Brine Treatment Recovery Overall Recovery RO53% || 81%91% || 96%39% || 67%85% || 92% EDM95% || N/A99% || N/A95% || N/A99% || N/A Key: Without Intermediate Treatment || With Intermediate Treatment Current overall recovery without brine treatment: Brighton 80%, La Junta 75%

18 Recommendations for Brine Minimization Technologies TechnologyRecommendation Dual Reverse Osmosis Model performance for Brighton and La Junta; Electrodialysis Metathesis (EDM) Project team supervised pilot test at Brighton and La Junta.

19 The Ideal ZLD Solution… Badwater Salt Flats Death Valley, CA


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