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