global renewables & hyder waste system cost calculator
Post on 18-Dec-2015
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WASTE SYSTEM COST CALCULATOR
Different people may be responsible for understanding the detail of individual waste management system components
Global Renewables identified the need for a “big picture overview” of the full system
Likely to be the biggest financial commitment any council will make (when you consider the full system)
Aim to minimize the costs to councils of achieving required resource recovery level
KEY ASSUMPTIONS
AWT diversion rates:
2-bin system 59%
3-bin system 57%
3-bin + food system 43%
4-bin system 43%
Default waste collection costs:
Residuals - $1.00/lift
Recycling - $1.20/lift
Organics - $1.40/lift
Other (adjustable) default costs
Landfill contract (ex. levy) - $65/t
Recycling gate fee - $25/t
Compost gate fee (garden organics) - $110/t
Compost gate fee – (garden and food) - $130/t
AWT processing cost (ex. disposal) - $150/t
Landfill disposal of AWT residuals - $45/t
INTERESTING FINDINGS
Based on trials with several councils, the model has been accurate in predicting diversion from landfill and total system costs
Within 1-3% of reported diversion rate
Default costs in the right ballpark
Ability to adjust with user-specific information as available
Lowest cost option to reach 66% target appears to be 3-bin
Dry recyclables
Garden organics to open windrow processing
Residual to AWT
The 3-bin system is marginally the lowest cost per tonne of waste diverted as well as total system costs (if GO contamination is low)
BUT – very much “horses for courses” depending on local conditions - e.g. can low GO contamination be achieved?
Most councils won’t achieve 66% target without AWT or very high GO percentage and relatively low residuals percentage
SYSTEM COMPARISON
TYPICAL RESULTS Diversion System Cost over 10 years
Cost/tonne of Waste Diverted
Bin Configuration Region Type Landfill AWT Landfill AWT Landfill AWT
2 bin suburban Sydney 20% 67% $80M $77M $739 $216
3 bin inner suburban Sydney 46% 77% $124M $120M $307 $176
3 bin + Food inner suburban Sydney 58% 76% $131M $134M $325 $219
3 bin outer suburban Sydney 54% 81% $178M $173M $251 $165
3 bin + Food outer suburban Sydney 65% 80% $195M $199M $275 $205
Overall costs broadly similar between AWT and landfill scenarios
Diversion rate significantly higher in all scenarios using an AWT
Differential between cost per tonne of waste diverted is highest in areas with low levels of garden organics
MODEL STRUCTURE
Aims to take account of total system costs
Equipment (MGBs / bench top bins)
Education
Bin lifts
Processing
Disposal
Does NOT address landfill external costs (other than GHG) or collection fleet effect on roads
Generic structure based on 10 year assessment (2014-2024)
Pre-loaded with NSW 2009-10 WARR Data
Allows for council-specific data to be included
Could be further modified to suit individual councils
CONTACT
If you would like further information about this presentation please contact John Lawson at Global Renewables – (02) 9235 1377
The model will also be available soon on the Global Renewables web site - www.globalrenewables.com.au
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