Cleaning Mains with IcePaul Treloar

Utility Service Group

Knowledge of a new technology

The benefits

Inspiration/Confidence to use the technology

An award winning innovative sustainable, advanced pipe

cleaning technology to improve water quality and asset

management

Developed by the University of Bristol England

Utility Service Group is Sole rights holder

Ice Pigging harnesses the

characteristics of a semi-

solid material

An ice pig is a semi-solid material that can be pumped like a liquid ….....

but behaves like a solid once the pig is formed in the pipe

Food grade, fine table salt (NaCl)

NSF approved

Harmless to customer supply

Additional chlorine may be added as disinfectant

To maintain the correct consistency a

freezing point depressant is used

• Pipe bends, changes in diameter or butterfly valves

• Excavation to launch

and receive pigs

• Interruptions to

supply

• Disinfection required

post clean

Operational LimitationsPigs

Swabs

Flushing/Air Scour/Jet Washing Operational Limitations

• High Water Usage 50% more water than ice pigging

• Inefficient - ice pigging 1000 x more effective

• Low flow rates -length of hose etc.

• Over aggressive -can damage pipe lining

Efficient rapid and environmentally friendly

Combines operational benefits of flushing with the impact of solid pigging

Ice Slurry injected through existing hydrants

System pressure pushes ice through complex water networks

Suitable for pipes of all size and material

Exceptionally low risk

Produces quantifiable results

Harmless to public

Iron

Manganese

Sediments

Biofilms

Fats, Oils, Greases (FOG)

Grit

Ice Pigging in Practice

Insertion & Discharge

Discharge to Ground Written State Approval Only

What Comes Out?

1) Sample from

front of pig

2) Sample from

middle of pig as

it carries the

sediment

3) Sample at end

of pig where ice

is clean

Before After

Cast Iron?

Before

Photos of the one exposed section and the

attached Strain Gauges and Temperature Sensors

Winner of Innovation Prize by Water UK

2010 Winner IWA Innovation Award: Global Grand Prizewinner

2014 ACEC/Vermont Grand Award Winner

26 States

Over 300 miles of pipe cleaned worldwide

88 Projects in US

100+ Miles across 26 States

Maximum length cleaned in one pass – 2.25 mi

2”-18” diameter pipe cleaned, testing up to 30”

Removed over 700 lbs./mile of sediment

Used in Sewer force mains & sewer siphons

Potable & raw water

World Renown

Award winning

Cost-effective method of pipe cleaning

Offers real cost savings

Rapid, environmentally friendly,

efficient solution

Exceptionally low risk

Contact Information:Paul TreloarCell: 478-244-4303ptreloar@utilityservice.com

www.utilityservice.com

or

USG’s New York State Water System Consultants:Roger Linder and Carol Smalley

Approximate Cost of Ice Pigging using 10T Rig

Max/Day (FT) $/FT

Max/Day (FT) $/FT

Max/Day (FT) $/FT

Max/Day (FT) $/FT

Max/Day (FT) $/FT

6" 8" 10" 12" 16"

PVC/AC/HDPE 12000 $1.00 7000 $1.71 4500 $2.67 3000 $4.00 2600 $4.62

Ductile Iron 9300 $1.29 5280 $2.27 3300 $3.64 2300 $5.22 1700 $7.06

Cast Iron Unlined 6300 $1.90 3500 $3.43 2200 $5.45 1500 $8.00 850 $14.12

What does it cost?

Stokes County Public WorksDate: August 27th- 29th

2012

Problem: Water system 30 years

old Build up of Manganese

and iron Discolored water

complaints Heavy sediment build up Insufficient water

storage for other cleaning techniques

Flushing not an option

ResultsBefore After

“Water quality has been greatly increased and customer complaints have all but disappeared”Mark Delehant – Director of Public Works Stokes County NC