From Curbside to Compost

Step 1:

Organics are collected in either an organics-only truck or the same truck as garbage or recycling, but in a different compartment. Once collected, organics are brought to a¬†waste drop off, sorting and transfer facility and then sent to one of the City’s two¬†organics processing facilities.
Collection truck and worker in front of a row of new Green Bins
Organics-only truck

Step 2:

Once at the organics processing facilities, the green bin material is unloaded onto something called a Tipping Floor. From there it’s put into something called a hydro-pulper where it’s mixed with water and plastic bags and other unacceptable materials are removed.
green hydropulper
Hydro-pulper

Step 3:

The remaining material is then put into something called an anaerobic digester, which uses oxygen deprivation to break down the material into something called a digestate. This process generates something called biogas, which can be used for heating or electricity or turned into renewable natural gas. The City is currently looking into technologies to turn its biogas into renewable natural gas and potential uses like fuelling its fleet of solid waste trucks.
anaerobic digestion vessel
Digester vessel

Step 4:

The City sends the digestate created through anaerobic digestion to contractors to be turned into high quality compost, which can be used in parks and gardens. The City gets some of the compost created back and gives it out to the public for free at Community Environment Days.
Digestate, a byproduct of anaerobic digestion
Digestate