Unitywater is undertook a major upgrade of Kawana Sewage Treatment Plant, one of the key sewage treatment facilities in the local area. The upgrade expanded the plant’s capacity, taking the treatment capacity from approximately 90,000 people to 200,000 people.

As part of this upgrade, Unitywater and Monadelphous constructed a new anaerobic digester to produce methane from the sewage biosolids. This was their first step towards a sustainable waste-to-energy solution to reduce their operating costs and dependence on electricity.