CASE STUDY

1
CASE STUDY

• NENAGH REGIONAL WATER
• SUPPLY PLANT

2
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

3
PUBLIC WATER Vs BOTTLED WATER
4
SUPPLY v TREATMENT X
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
(No Transcript)
12
Aluminium Sulphate (8)
13
(No Transcript)
14
LOG OF CHANGES TO DOSE RATES
15
ENHANCED COAGULATION
16
DOSING - REFERENCE CHART
17
(No Transcript)
18
(No Transcript)
19
Carbon Dosing
20
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.

21
TURBIDITY MONOTORING
22
POST - FILTRATION

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

23
CHLORINE DIOXIDE
24
(No Transcript)
25
(No Transcript)
26
CHLORINE CONTROL
27
INSPECTION TESTING

• SAMPLING PLAN
• - SOURCE WATER
• - SETTLED WATER
• - FILTERED WATER
• - FINAL WATER

28
(No Transcript)
29
Final Water Cryptosporidium Monitoring
30
(No Transcript)
31
Continual Improvement

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

32
(No Transcript)
33
(No Transcript)
34
(No Transcript)
35
Issues

• Process Chemicals - data
• CARs - review
• Paperwork - volume
• Design - practical

36

• END