Waste 2 Gold – Adding value to waste Dealing with organic waste in Rotorua
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 waste � Opportunities to - Reduce transportation costs - Improve WWTP performance - Avoid GHG production • Pilot for landfill opportunity � Staged approach
Composition of landfill waste Paper Kitchen/food Greenwaste Other putrescibles Textiles Nappies and sanitary Timber Biosolids Other potentially hazardous Ferrous material Glass Non ferrous material Rubble Plastic Rubber
Potential Waste 2 Gold feedstocks Paper Kitchen/food Greenwaste Other putrescibles Textiles Nappies and sanitary Timber Biosolids
Waste 2 Gold Technology Platform High Carbon Solid Wastes Biomass Deconstruction Biodegradable Intermediates Energy Recovery Bioenergy Bioconversion Liquid biofuels Biopolymers
Glucose (15g/L) 200 ° C / 40Bar / 2hrs 100% Oxygen 0%Oxygen
Acetic acid “Organic waste” 200 ° C/40Bar - meat scraps Acetone 2hrs - vege scraps - newspaper 20% O 2 Acetaldehyde 2-Methylbutanal Furfural
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 � Biosolids � Landfill • Partnership between RDC and Scion
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