Transcript MWA Spring Workshop May 2014 - Municipal Waste Association

Do You See the
Difference?
Colour Cues to Influence
Source Separation
Jacquie Colangelo
City of Hamilton
MWA Spring Workshop May 2014
The Fine Print
• Test of a potential pilot
• Weight-based metric to measure
human behaviour is flawed
MWA Spring Workshop May 2014
The Situation
• Going “green”
• Green Team
• Before we’re green
•
Blue contamination
• Perception is reality
MWA Spring Workshop May 2014
The Hypotheses
1. “Sort” more than a “green” problem
– Overcome blue barriers
2. Colour differentiation helps sorting
– Decreases contamination
3. The sooner the colour is introduced,
the better the sorting
MWA Spring Workshop May 2014
The Methodology
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Pre- and post-audits
Two weeks in between
Two study groups, one control group
“Counts” vs. weights
MWA Spring Workshop May 2014
The Buildings
• 10 buildings
• 2 small (<15 units)
• 4 medium (16-30 units)
• 4 large (>30 units)
• ~550 units
MWA Spring Workshop May 2014
The Study Groups
Comm
Materials
Grey In-Unit
Container
Grey Carts
Control
Study #1
Study #2
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MWA Spring Workshop May 2014
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The Numbers / Results
Containers
Papers
Control
-0.4%
+1.5%
Study 1
-8.6%
-6.2%
Study 2
-1.3%
-5.5%
Numbers represent contamination.
MWA Spring Workshop May 2014
The Conclusions
• Colour
• Makes a positive difference
• Differentiation at “source” sort
• “Count” vs. weights
• Yay / Nay
MWA Spring Workshop May 2014
[email protected]
MWA Spring Workshop May 2014