Planning and Implementing a Brackish Water

Transcription

1 Planning and Implementing a Brackish Water Desalination Facility Water Research Foundation Webcast John Balliew, P.E. El Paso Water Utilities El Paso, Texas October 22, 2009

2 Regional Water Resources

3 Site Overview

4 EPWU Wells Desalination Plant Site

5 EPWU Wells Feed Wells Desalination Plant Site

6 EPWU Wells Feed Wells Blend 1 Desalination Plant Site

7 Deep Well Injection Site Desalination Plant Site

8 Cost

9 Desalination Capital Costs Total Capital Costs $87 Million $5.9 $6.3 $1.4 $4.1 $36.8 $7.1 $6.3 $6.7 Plant Source Wells Collector Line Blend Well Collector line Blend Wells Pilot Injection Well $3.8 $5.3 Resource Well Rehab Blend, Loop & Concentrate Lines In Millions Concentrate line to Injection Well Site Blend Wells Equipment Other Injection Wells

10 Annual Operating Costs Assumes $0.07/kwh and 80% Operation (Projected) Wells, collectors $ 700, Fort Bliss (water and land) $ 1,300,000 Desalination Plant $ 2,600, Disposal $ 200,000 Finished water pipeline pp $ 26,000 Total $ 4,826,000

11 Amortized Capital and O&M ($/AF) (Projected) Wells, Collectors $ 189 Ft Bliss (water and land) $ 42 Desalination Plant $ 232 Disposal $ 49 Finished Water Pipeline $ 22 Total ($/AF) $ 534 Equivalent in $/1000 Gal. = $ 1.64

12 Importati tion $4.50 $4.00 $3.50 $3.00 $2.50 $2.00 $1.50 $1.00 $0.50 $0.00 Cost Comparison Surface Water Desalinati tion Reclaim med ater Groundwat Cost in Dollars Per 1,000 Gallons

13 Water Quality Issues Important t Points Pilot Plant Water Quality Goals Distribution ib ti System Water Quality

14 Design - with the public in mind

15 Plant Staffing Plant Superintendent - 1 Assistant t Superintendent t 1 Plant Technicians i - 12 Automate t Train

16 Treatment Overview

17 Plant Wells Wells are dedicated to Desalination Plant 16 Source Wells (Airport) Average depth 900 feet Average pumping p rate 680-1,100 gpm 16 Blend Wells (Fort Bliss) Average depth 900 feet Average pumping rate 680-1, gpm

18 Raw Water Sand Strainer Rated at 12,600 gpm 25 Micron Screen C b t ti Can be set on a timer or DP of 7 psi

19 RO Skids 5 Skid mounted two stage each Five Afton RO feed pumps, vertical turbine, variable speed 72 Pressure vessels PROTEC/BEKAERT Progressive Composites 504 Membranes 8 x 40, Hydranautics ESPA1A

20 Effective Clean in Place System One cartridge filter housing Two 4,700 gallon chemical tanks One 60 hp pump Permeate storage and flush King Lee antiscalant

21 Clearwell Storage & Finished Water

22 Concentrate t Pump Stationti Three 250 hp pumps for a combined 3 mgd Concentrate line - 18 HDPE Blend capability directly from blend wells Acid feed capacity

23 Concentrate t Pump Stationti Concentrate Blend Water

24 Three Surface Injection Facilities Each facility consist of: 1. Storage Tank approx. 100,000 gallons 2. One injection well - approx. 4,000 deep 3 Power provided by solar panels batteries & back-up 3. Power provided by solar panels, batteries & back-up generator

25 Storage Tank Surface Injection Facility

26 Surface Injection Facility Injection Well

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29 Concentrate Arsenic

30 Arsenic Monitoring: i Traditional lapproach Arsenic Testing at El Paso Water Utilities Laboratory Perkin Elmer ICP/MS Elan DRC-e 1 ppb detection ti limit it Accurate and precise results Problem time lag

31 Safe Guard SafeGuard is a fully automated arsenic analyzer placed on-site - manufactured by TraceDetect, Inc. (

32 For More Information Contact John E. Balliew, P.E. Vice President El Paso Water Utilities Office: