Dealing with organic waste in Rotorua
Waste 2 Gold – Adding value to waste
Waste 2 Gold Approach
• Targeting solid organic wastes
• Adding value
Reduce costs
Generate income
Mitigate impacts
• Energy production and beyond
RDC Project
• Focus on biosolids from the WWTP
14% of landfill wasteOpportunities to- Reduce transportation costs- Improve WWTP performance- Avoid GHG production
• Pilot for landfill opportunityStaged approach
Paper Kitchen/food Greenwaste Other putrescibles Textiles Nappies and sanitary
Timber Biosolids Other potentially hazardous Ferrous materialNon ferrous material Glass Rubble Rubber Plastic
Composition of landfill waste
Paper Kitchen/food Greenwaste Other putrescibles Textiles Nappies and sanitary
Timber Biosolids
Potential Waste 2 Gold feedstocks
Waste 2 Gold Technology Platform
BiomassDeconstruction
High CarbonSolid Wastes
Energy Recovery
Biodegradable Intermediates
Bioconversion Liquid biofuels
Biopolymers
Bioenergy
100% Oxygen 0%Oxygen
Glucose (15g/L)200°C / 40Bar / 2hrs
“Organic waste”- meat scraps- vege scraps- newspaper 20% O2
200°C/40Bar2hrs
Furfural
Acetic acid
Acetone
Acetaldehyde
2-Methylbutanal
Biosolids deconstruction
• >90% reduction in solids
• Acetic acid generated
Bioconversion Platforms
• Methane generation base case• Feedstock for industrial biotechnology
platform
Summary
• There is value in waste• Thermochemical approaches
increasing internationally• Approach is a step-change in thinking• Will increase landfill life
Mitigate greenhouse gases• Staged approach
BiosolidsLandfill
• Partnership between RDC and Scion
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