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Frank Dick, P.E. City of Vancouver, Department of Public Works
Frank Dick, P.E. City of Vancouver, Department of Public Works - - PowerPoint PPT Presentation
Frank Dick, P.E. City of Vancouver, Department of Public Works - - PowerPoint PPT Presentation
Frank Dick, P.E. City of Vancouver, Department of Public Works Franks Reason Costs Three Large Pump Stations (From 2008 2013) $ 78,000 annual maintenance $ 30,000 annual electricity $ 650,000 new pumps $ 31,000 annual
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Costs
Three Large Pump Stations
(From 2008 – 2013)
- $ 78,000 annual
maintenance
- $ 30,000 annual electricity
- $ 650,000 new pumps
- $ 31,000 annual disposal
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Toilet Paper after 40 seconds “Flushable” Wipe after 16 hours
Non-Dispersibles - 6
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Claims / Disclaims
Travel
My time my dime NACWA
Work
Off Time City of Vancouver
Interpretations, Opinions are Mine
NACWA - WEF - APWA International Organizations Manufacturers
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Characteristics of Wipes and Stuff in Sewers Working with Stakeholders (mfrs and WW) International Water Services Flushability Group Disintegration and the Reynolds Number Better Labeling and Information (Code of Practice) Other U.S. and world efforts
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What We Find in Clogs
(Paper / fiber products)
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Jargon
INDA – non-wovens industry trade group GD3 – Guidance Document 3rd edition of Flushability Guidelines (FG) GD4 – Guidance Document (4th Edition) TWG – Technical Workgroup MPT – municipal pump test SB – slosh box SFM – simulated fecal matter ISO TC 224 WG 10 IWSFG – International Water
Services Flushability Guidelines
WOW – World of Wipes
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What Wipes are Made of and Their Properties
Cellulose / pulp fibers Rayon or Lyocell – regenerated cellulose fibers Typically put together using spunlace method.
Spunlace product after pump
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Wet Inside Package
Water based solutions to stabilize structure / strength Lotions and additives
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When and Wear a Wipe Breaks Apart
Hits water – chemical / ion trigger Toilet – mechanical forces Flow through sewers – hydraulic/mechanical forces Pumps – mechanical forces (too late) Screens – mechanical forces Never
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Dry & Wet Strength
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Dealing with Manufacturers
Costco Meeting - 2013
Technical Workgroup
- 2014
GD4 – 2015 to 2016 ISO – 2014 – 2016
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Dealing with Manufacturers
Costco Meeting - 2013
No Way! Agree to improve DNF
- n baby wipes
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Dealing with Manufacturers
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Dealing with Manufacturers
Costco Meeting - 2013
Technical Workgroup - 2014
GD4 – 2015 to 2016 ISO – 2014 – 2016
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Findings TWG - 2014
GD3 currently - screen against high wet strength wipes Flushability Guidelines if modified could produce a claim for a flushable nonwoven wipe Slosh Box and Municipal Pump Tests priority for modification
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Dealing with Manufacturers
Costco Meeting - 2013 Technical Workgroup - 2014
Guidance Doc rev4 – 2015 to 2016
ISO – 2014 – 2016
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Dealing with Manufacturers
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GD4 Focus - 2015
01 Toilet and Drainline 02 Slosh Box Disintegration 03 Household Pump 04 Settling 05 Aerobic Bio-Disintegration 06 Anaerobic Bio-Disintegration 07 Municipal Pump
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INDA 7 Tests
Municipal Pump Test Anaerobic
Biodisintegration
Aerobic
Biodisintegration
Toilet and Drainline Clearance Disintegration Test Slosh Box Household Pump Settling
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Pump Power Increases with Clogged Flushable Wipes
2.50 2.75 3.00 3.25 3.50 175 350 525 700 875 Power kW Time sec Code 30 Code 30 Code 31 Code 31 Code 32 Code 32 Code 33 Code 33 Code 34 Code 34 Code 35 Code 35 Code 36 Code 36 Code 37 Code 37 Code 38 Code 38 Code 39
BAD, but GD3 Compliant
Really Bad – Not GD3 Compliant Better, but still not dispersible These are acceptable
15% 1% Dutch 10%
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Test Conditions & P/F Endpoints
CurrentINDA GD3
WW Proposal GD4
Pump Test
Flygt 3hp pump Pre-soak 1 hour 10-sec intervals; 6 min Average percent power increase NTE 15% No change Average power increase max 1% with no spike point over 5%
Slosh Box
2L 26 RPM 180 minutes slosh time > 25% of mass pass through 12.5 mm sieve 4L 13 RPM 30 minutes slosh time No pieces > 1” in any direction
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Dealing with Manufacturers
International Organization for Standardization
TC 224 – Service activities relating to drinking water supply
systems and wastewater systems.
WG 10 - Flushable products
Stakeholders including WW and MFRs Set out to develop flushable standards . . . No consensus / No standards . . . Instead there is:
Technical report – EXPECTED LATE 2018
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Dealing with Manufacturers
Costco Meeting - 2013 Technical Workgroup - 2014 GD4 – 2015 to 2016
ISO - 2014 – 2016
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Product Stewardship
Code of Practice
Reduce consumer confusion Encourage mfr and retailer participation Encourage proper disposal Labeling – sizing & location Decision Tree for Labeling (& claim of
flushability)
All baby wipes to be labeled Do NOT Flush (logo) regardless of flushable
Diameter
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Dealing with Manufacturers
Costco Meeting - 2013 Technical Workgroup - 2014 GD4 – 2015 to 2016 ISO – 2014 – 2016
Just WW People Worldwide
IWSFG - 2016 - 2018
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IWSFG
International Water Services Flushability Group
WWW.IWS W.IWSFG FG.ORG .ORG
United States Australia Canada New Zealand Japan Spain
The criteria for flushability and test methods are a global consensus of the members and reflect the hyd ydraulic, , mec mecha hanical and en environmental conditions
- f drain lines, on
- nsi
site te treat atment syste tems, wa wast stewat ater r col
- llection and treat
atment syst stems, and the rec eceiving wa wate ters rs for treatment plant effluents.
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IWSFG
International Water Services Flushability Guidelines
Specifications for Flushability Encouraged for national, regional and local governments
- Claim of flushability
- Labeling for bathroom / toilet
products “Do NOT Flush”
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IWSFG
International Water Services Flushability Group
2016 – International Statement Summer 2017 - First draft flushability specifications Winter 2018 – Second draft Received several hundred comments FINAL specifications – June 2018
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IWSFG
International Water Services Flushability Guidelines
Toilet Clearance – 3 flushes, no plunger Drain Line Flow Clearance – 5 flushes to clear Disintegration - Settling – 20 min to settle; no buoyancy Anaerobic Biodisintegration – Absence of persistent
metabolites; residue pass through 600 um sieve
Fiber Analysis – no plastic fibers
New!
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IWSFG
International Water Services Flushability Guidelines
Slosh Box
Oscillating Box – 18” x 12” x 12” 11º angle 4 Liters 16 rpm 30 minutes
Pass through 25 mm perforated sieve (2 min rinse)
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IWSFG
International Water Services Flushability Guidelines
Labeling & Code of Practice
On the Face of Sales Packaging: Clear & visible statement:
“This product is not flushable and should be disposed of by alternative means”
DNF Label 2cm x 2cm
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UK Ventured on Its Own – Water Industry Standards
“WIS”
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INDA May Publish GD4 SOON!
without Wastewater Consent
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On-Hold Mfr Lawsuit
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Lawsuits & Rulings
Individual and Class Action Ohio New York Minnesota FTC – 2014 Australia – Last Week !!!
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Slosh Box – Reynold’s Number Correlation
Re = Rh V ρ / µ
Ratio of inertia force, and viscous (friction) force
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Re 20,000
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South Interceptor 1.7 fps 31 min (2,816 ft)
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Fatih’s Re Number Graphic - Flasks
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Fatih’s Re Number – Slosh Box
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Fatih’s Re Number – Slosh Box
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3 P’s
(4 if you count puke)
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