This project involved the integration of an energy efficient anaerobic digestion system into the Slave Lake Pulp wastewater treatment system.

Waste activated sludge is generated in large quantities at pulp mills and is usually either incinerated, land filled or land applied. With the integration of the new system, the treatment facility can generate a methane rich biogas to generate electricity and heat for use in the pulping process.

“There are actually multiple opportunities to extract energy throughout the pulping process and this system will now allow us to actually take advantage of some of this lost energy, while also reducing our consumption,” said Rod Albers, Manager of Energy and Bio-Product Development with West Fraser.