Transforming Biosolids into Biochar

Innovating Wastewater Treatment: Transforming Biosolids into Biochar

The CRD is taking an important next step toward introducing carbonisation technology to transform Class A biosolids, the solids left over from wastewater treatment, into biochar, a carbon-rich material that helps reduce greenhouse gas emissions, destroy contaminants of concerns, and store carbon. This will be the first project of its kind in Canada and builds on the CRD’s strategic investments in wastewater treatment to maximize resource recovery. 

Since wastewater treatment was introduced in 2020, the CRD has been pursuing sustainable, cost-effective options to use biosolids for community benefit. In 2024, the CRD Board identified thermal technologies [carbonisation] as the long-term approach to converting biosolids to biochar - a stable, carbon-rich product offering a variety of potential benefits across construction, industrial, agriculture, and forestry sectors.

Introducing the added carbonisation step to wastewater treatment is cost-competitive with the CRD’s current biosolids management practices, while significantly reducing volumes, destroying contaminants of concern, and locking in carbon.  The process will move forward in stages, with clear decision points for the CRD Board and opportunities for input from First Nations and the public. At each stage, engagement and feedback will help shape the next steps.  

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