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Water Efficiency at Clayton County Water Authority

Water Efficiency at Clayton County Water Authority. Guy Pihera Water Production Manager. Contents. Background Distribution Programs Treatment Plant Programs. Clayton County Water Authority. W.J. Hooper, 20mgd. Freeman Road, 10mgd. J.W. Smith, 12mgd. Conservation Plan.

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Water Efficiency at Clayton County Water Authority

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  1. Water Efficiency at Clayton County Water Authority Guy Pihera Water Production Manager

  2. Contents • Background • Distribution Programs • Treatment Plant Programs

  3. Clayton County Water Authority W.J. Hooper, 20mgd Freeman Road, 10mgd J.W. Smith, 12mgd

  4. Conservation Plan • CCWA has a conservation plan on file with EPD • System management • Treatment plant management • Rate-making policies • Recycle & Reuse • Public education

  5. Standard Plumbing Code • Low-flow fixtures enforced for new development

  6. Metropolitan North Georgia Water Planning District

  7. Demand Projections • No conservation measures • With SF toilet retrofit

  8. Drought Contingency • Outdoor watering restrictions • Flushing suspension • Hydrant maintenance suspension • Purchase from neighbors Notice to customers of the Clayton County Water Authority: “Non-essential” Outdoor Water Use Definitions The ban on non-essential use is intended to reduce the demand on water reserves from lawn watering and car washing.

  9. Georgia <10% Wisconsin 25%

  10. Survey of State Agency Water Loss Reporting Practices …the Georgia Environmental Protection Division defines unaccounted-for water as “the difference between the total amount of water pumped into the water system from the source(s) and the amount of metered water use by the customers of the water system expressed as a percentage of the total water pumped into the system” (Rules and Regulations of the State of Georgia Chapter 391-3-2-.02 Definitions, Amended). • Final report to the American Water Works Assn, 1/02.

  11. Production Purchased (Gallons billed) (Leaks & Flushing) Gallons unaccounted

  12. 7.81% 10.82%

  13. CCWA Leak Detection Services

  14. Flow Metrix • Connect both field sensing units (FSU) to the water distribution system • FSUs can be connected to meters, service lines, fire hydrants and valves

  15. Flow Metrix • Once the base and the FSU radios are linked, the correlation process will begin automatically • The peak that develops in the correlation function indicates a leak • It usually takes between 1-30 seconds for a peak to develop Leak

  16. Z-Corr Digital Correlating Logger

  17. Z-Corr Digital Correlating Logger • Place unit in the field, on valve, meter, etc. • Retrieve unit • Download data • Computer correlates and shows leak location

  18. Leak Detection Monthly Report

  19. Meter Testing and Repair • Meter is stopped • Work order generated by data processing if meter readings don’t change

  20. Meter Testing and Repair • Meter tested up to standard

  21. 850 MG/yr $3.5 M/yr Jan 99 – Aug 00: All 3” and larger meters were tested - repaired/replaced

  22. 69,909 meters 99.25% accuracy

  23. Hydro-Guard Automatic Flushing Device

  24. Summary • CCWA metered our flushing program. Before installing the Hydro-Guard Automatic Flushing Device we were flushing 3,384,000 gal/mo, manually spending at least 15 hrs/wk in personnel time. • After installing the device, our gallons flushed dropped to 933,300 gal/mo and 1-1/2 hrs/wk in personnel time. • Cost savings in flushed water estimated to be above $4500/mo or 2.5 MG/mo

  25. Production Plant Programs

  26. Metered: Raw, Finished, Backwash, Process

  27. Backwash Recycling

  28. Reclamation Plant Programs

  29. Reclamation Plant Programs 17,000,000 gal/mo 1,000,000 gal/day

  30. CCWA Practices What it Preaches • Saved 17,000,000 gal/mo at biosolids pelletizing plant by using reclaimed water for scrubber/dust removal system and sludge press belt wash. • Saved 1,200,000 gal/mo at the W.B. Casey Water Reclamation Facility by converting chlorinators to reuse water.

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