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TREATMENT OF PRODUCED WATER FOR REUSE
- 1. WATERSTRIDER TREATMENT INC. waterStrider treatment of produced water for reuse Dr. Rob Stephenson and Darren Maley
- 2. 2 WATERSTRIDER TREATMENT INC. waterStrider treats O&G water for water reuse and resource extraction • waterStrider • Misty Sweet • LiREC 2 WATERSTRIDER TREATMENT INC. Create value from wastewater
- 3. 3 WATERSTRIDER TREATMENT INC. waterStrider Aggressively supplies oxidizing conditions to force solids production from dissolved metal contaminants Removes solids and contaminants with potential to form solids Treated water for reuse has reduced potential to form solids Suspended solids and potential suspended solids Pumping and storing water may expose produced water, flow back, and water flood to oxygen in air Oxygen exposure creates solids from some dissolved metal contaminants that may plug production wells and disposal wells
- 4. 4 WATERSTRIDER TREATMENT INC. Untreated Produced Water Storage waterStrider Filter Press Ozone Generation Free Oil Separation Amprey MikroForme Air Flotation MikroForme Ozonation Filtration Air Dewatered & Stable Solids Cake to Landfill Disposal Recovered Oil Produced Water Treated Produced Water Storage Coagulant Oxygen Concentrator Polymer Treated Water to Reuse + Misty Sweet Misty Sweet
- 5. 5 WATERSTRIDER TREATMENT INC. MikroForme Micro-bubble flotation and gas transfer • Separate coagulated/flocculated solids from water • Simultaneously introduce oxygen, ozone • Mechanically simple • Scalable
- 6. 6 WATERSTRIDER TREATMENT INC. Amprey Metal pellet electro-chemical cell • pH control + coagulation Commodity Anode Pellets • Aluminum • Steel • Magnesium
- 7. 7 WATERSTRIDER TREATMENT INC. Misty Carbon dioxide capture and usage • Scrub CO2 from generator exhaust: free source of acid • pH neutralization enhances reuse value of treated water (clean brine) by O&G producers – less fouling
- 8. 8 WATERSTRIDER TREATMENT INC. Alkaline Water pH Neutralized Water to Reuse or Disposal Misty Sweet CO2 in Filtered Generator Exhaust Misty CO2 Scrubber Excess CO2 to Vent pH • Use acidity of CO2 in generator exhaust to neutralize alkaline water • Small increase in alkalinity occurs but significant drop in pH: • Target pH 6.5 to 7.0 • Minimizes scaling potential of treated water
- 9. 9 WATERSTRIDER TREATMENT INC. Remove contaminants that prevent reuse of produced, flow back or water flood • Iron, oil & grease, suspended solids, bacteria • pH: neutral Impacts • Clean brine for reuse • Minimize fresh water requirements • Minimize disposal requirements • Reduced costs to manage water
- 10. 10 WATERSTRIDER TREATMENT INC. Ambient temperature High temperature
- 11. 11 WATERSTRIDER TREATMENT INC. Results Producer O&G [mg/L] TSS* [mg/L] Total Iron [mg/L] Bacteria [CFU] Feed Treat Feed Treat Feed Treat Feed Treat 1 448 2.0 406 48 13 <5.0 - - 2 2.3 <2.0 345 58 83 <0.100 11,600 1,270 3 24.6 <2.0 1,390 28.4 94.4 <0.100 5,760 1,440 4 6.4 0.72 397 54 11.8 <0.100 14,390 1,800 5 4.0 <2.0 125 42.4 50.4 <0.1 4,580 590 *TSS not corrected for TDS (approx. 50 mg/L)
- 12. 12 WATERSTRIDER TREATMENT INC. Particle size distribution Feed Treat Sample D 50 [m] Range [m ] Feed 12.49 0.375 – 116.3 Treat 1.136 0.520 - 2.539 waterStrider removes large particles that plug production wells and disposal wells
- 13. 13 WATERSTRIDER TREATMENT INC. Dewatered solids
- 14. 14 WATERSTRIDER TREATMENT INC. Metal Filter Cake [mg/kg dry] Leachate [mg/L] Solid Hazardous Waste (Alberta Environmental Protection ) [mg/kg] Arsenic <0.30 <0.010 500 Beryllium <0.10 <0.050 100 Cadmium 0.055 <0.001 100 Chromium 24.2 <0.050 500 Iron 41,500 <1.0 - Lead 15.9 <0.010 500 Mercury <0.040 <0.002 20 Nickel 4.52 <0.10 500 Selenium <0.20 <0.020 200 Silver <0.10 <0.002 100 Thallium 0.2 <0.010 200 Uranium 0.053 <0.020 100 Non-leachable dewatered solids (e.g.)
- 15. 15 WATERSTRIDER TREATMENT INC. Gravity drainage tests 0 100 200 300 400 500 600 700 0 50 100 150 200 250 300 350 Time (s) Volume (mL) Gravity Column Drainage Test
- 16. 16 WATERSTRIDER TREATMENT INC. Gravity drainage tests
- 17. 17 WATERSTRIDER TREATMENT INC. Chemicals work better with treated water FR @ 0.1 L/m3 Feed Water FR @ 0.1 L/m3 Treated Water
- 18. 18 WATERSTRIDER TREATMENT INC. Improved chemical usage with treated water Feed water with Anionic FR Treated water with Anionic FR Feed water with Anionic FR Treated water with Anionic FR
- 19. 19 WATERSTRIDER TREATMENT INC. LiREC recovery of lithium from O&G produced water 19 • Some oil & gas produced water in Alberta contains elevated lithium concentrations • LiREC recovers dissolved lithium and requires just moderate process changes to waterStrider • Potential for added revenue while treating produced water for reuse Contaminant Units Influent Treat % Removal Producer 1 mg/L 34.7 0.805 98 Producer 2 mg/L 56.6 9.65 83
- 20. 20 WATERSTRIDER TREATMENT INC. Untreated Produced Water Storage waterStrider Filter Press Ozone Generation Free Oil Separation Amprey MikroForme Air Flotation MikroForme Ozonation Filtration Air Dewatered & Stable Solids Cake to Landfill Disposal Recovered Oil Produced Water Treated Produced Water Storage Coagulant Oxygen Concentrator Polymer Polymer LiREC Dewatered Solids Cake of Lithium Concentrate Filter Press Treated Water to Reuse + LiREC Misty Sweet
- 21. 21 WATERSTRIDER TREATMENT INC. Technologies developed for use at industrial scale • Proven, proprietary, patented or patent-pending • Chemical, electrochemical, physical processes • No membranes, no ion exchange • Small footprint, transportable, highly scalable • Low operating costs, user-friendly, automatable • Fast, efficient, real-time processing LiREC: Treat O&G water for reuse and recover lithium waterStrider LiREC Water Treatment Lithium Extraction Misty CO2 Utilization
- 22. 22 WATERSTRIDER TREATMENT INC. Greenhouse gas emission reduction 22 1. Reduced fuel consumption • Less trucking or pumping of fresh water supply and produced water disposal • GHG reduction depends on distance travelled and load 2. Carbon capture and usage • Use scrubbed CO2 from generator exhaust as free source of acidity • Misty Sweet: CO2 acidifies sour water for H2S stripping 3. Avoided chemical use • Acid, caustic, O&G production chemicals (each has its own carbon intensity)
- 23. 23 WATERSTRIDER TREATMENT INC. waterStrider is transportable in skid mounted process units. This allows for flexible layout based on site configuration. waterHub
- 24. 24 WATERSTRIDER TREATMENT INC. By using waterStrider producers can: 24 Generate Conserve Reduce Eliminate Support Generate Revenue by treating water for re-use and by recovering lithium Conserve Fresh Water by treating water for reuse, not disposal Reduce Greenhouse Gas Emissions by less trucking of water and by Misty Sweet scrubbing of CO2 in generator exhaust to acidify treated water for reuse Eliminate Produced Water Contaminants and avoid fouling equipment and production reservoirs Support Local Employment to build and operate waterStrider waterHubs Unlocking value Save Save Costs to supply fresh water and dispose of contaminated water and waste
- 25. Contact Rob Stephenson PhD rstephenson@waterStridertmt.com Darren Maley dmaley@waterStridertmt.com 2022 waterStrider Open House Date: Monday, May 16th, 2022 Time: 4:00 PM – 7:00 PM Where: 7056 H Farrell Rd SE, Calgary, AB Food and refreshments will be provided
- 26. 26 WATERSTRIDER TREATMENT INC. Filter Press Ozone Generation Amprey Air Dewatered & Solids Cake to Landfill Disposal Sour Water Pre-treated Sour Water to waterStrider Oxygen Concentrator Misty Sour CO2 in Filtered Generator Exhaust Misty H2S Stripper + CO2 Scrubber Misty Scrubber pH H2S (g) Steps • Scrub CO2 to acidify sour water • Strip H2S (aq) to form H2S (g) • Alkaline scrub H2S (g) using Amprey • Dewater precipitated solids