Water Efficiency at Clayton County Water Authority

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 lt10 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 dont 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
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
Backwash Recycling
31
Reclamation Plant Programs
32
Reclamation Plant Programs
17,000,000 gal/mo

• 1,000,000 gal/day

33
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.