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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

NENAGH REGIONAL WATER

SUPPLY PLANT


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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


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PUBLIC WATER V’s BOTTLED WATER


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SUPPLY√TREATMENTX


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NENAGH R.W.S.P.

COMMISSIONED - 1997

  • ISO9001 - 1998

  • HYGIENE MARK - 1999

  • Q – MARK - 2000

  • ISO14001 - 2003

  • E.T.P. - 2005



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PROCESS CHEMICALS

  • SPECIFICATION (Food Grade, Conc., Tolerance)

  • CERTIFICATE OF ANALYSIS

  • CHEMICALS FOLDER

  • SUMMARY RECORD

  • TRACEABILITY


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Source Water


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Coagulation & Flocculation


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PROCESS CONTROL

CHEMICAL DOSING

- 7 CHEMICALS

- VERIFICATION

- DAILY







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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.


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TURBIDITY MONOTORING


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POST - FILTRATION

  • CHLORINE DIOXIDE - Taste

  • CHLORINATION - T.H.M.

  • FLUORIDATION

  • PHOSPHORIC ACID - Enhanced Coagulation




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INSPECTION & TESTING

  • SAMPLING PLAN

    - SOURCE WATER

    - SETTLED WATER

    - FILTERED WATER

    - FINAL WATER


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Final WaterCryptosporidium Monitoring


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Continual Improvement

  • Key Performance Indicators (K.P.I.)

    - Process

    - Quality

    - Cost

    - Environmental

    - External Audit Results ( eg. H-Mark Score)


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Issues

  • Process Chemicals - data

  • CAR’s - review

  • Paperwork - volume

  • Design- practical