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CASE STUDY

CASE STUDY. NENAGH REGIONAL WATER SUPPLY PLANT. PUBLIC WATER SUPPLIES PERSPECTIVE. BOTTLED WATER USAGE in IRELAND = 0.3 million Litres / day NENAGH R.W.S.P. PRODUCTION = 7.5 million Litres / day NORTH TIPPERARY Co. Co. PRODUCTION = 26 million Litres / day.

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CASE STUDY

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  1. CASE STUDY NENAGH REGIONAL WATER SUPPLY PLANT

  2. PUBLIC WATER SUPPLIESPERSPECTIVE • BOTTLED WATER USAGE in IRELAND = 0.3 million Litres / day • NENAGH R.W.S.P. PRODUCTION = 7.5 million Litres / day • NORTH TIPPERARY Co. Co. PRODUCTION = 26 million Litres / day

  3. PUBLIC WATER V’s BOTTLED WATER

  4. SUPPLY√TREATMENTX

  5. NENAGH R.W.S.P. COMMISSIONED - 1997 • ISO9001 - 1998 • HYGIENE MARK - 1999 • Q – MARK - 2000 • ISO14001 - 2003 • E.T.P. - 2005

  6. Nenagh Regional Water Supply Plant

  7. PROCESS CHEMICALS • SPECIFICATION (Food Grade, Conc., Tolerance) • CERTIFICATE OF ANALYSIS • CHEMICALS FOLDER • SUMMARY RECORD • TRACEABILITY

  8. Source Water

  9. Coagulation & Flocculation

  10. PROCESS CONTROL CHEMICAL DOSING - 7 CHEMICALS - VERIFICATION - DAILY

  11. Aluminium Sulphate (8%)

  12. LOG OF CHANGES TO DOSE RATES

  13. ENHANCED COAGULATION

  14. DOSING - REFERENCE CHART

  15. Carbon Dosing

  16. CLARIFICATION & FILTRATION • CLARIFIERS - 3 x 500 M3 Tanks - Upward Flow Rate (Max.) = 1.8 M/Hr. • FILTERS - 3 x R.G. Sand Filters - Filtration Rate (Max.) = 3.9 M/Hr.

  17. TURBIDITY MONOTORING

  18. POST - FILTRATION • CHLORINE DIOXIDE - Taste • CHLORINATION - T.H.M. • FLUORIDATION • PHOSPHORIC ACID - Enhanced Coagulation

  19. CHLORINE DIOXIDE

  20. CHLORINE CONTROL

  21. INSPECTION & TESTING • SAMPLING PLAN - SOURCE WATER - SETTLED WATER - FILTERED WATER - FINAL WATER

  22. Final WaterCryptosporidium Monitoring

  23. Continual Improvement • Key Performance Indicators (K.P.I.) - Process - Quality - Cost - Environmental - External Audit Results ( eg. H-Mark Score)

  24. Issues • Process Chemicals - data • CAR’s - review • Paperwork - volume • Design- practical

  25. END

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