Wynnum Wastewater Treatment Plant

Located in Lytton and serving a broad catchment across Brisbane’s bayside suburbs, the Wynnum Sewage Treatment Plant plays a vital role in the region’s water management infrastructure. Designed to meet the growing needs of a diverse and expanding community, the facility combines advanced engineering with robust, large-scale construction to deliver efficient and sustainable sewage treatment.

At the heart of the plant is a 130-metre-long monolithic oxidation ditch, an impressive structure that acts as the primary biological treatment component. This continuous loop system supports aerobic microbial activity, which breaks down organic matter in the sewage. Its monolithic construction ensures durability and efficiency, enabling a stable treatment environment and minimising long-term maintenance requirements.

Complementing the oxidation ditch are segmental, post-tensioned circular clarifiers—another key feature of the facility. These precision-engineered structures facilitate the final stage of the treatment process, where solids are settled out of the wastewater, allowing clean effluent to be discharged or further processed. The post-tensioning process used in their construction ensures structural integrity under varying loads, while the segmental design allows for efficient construction and long-term resilience.

Together, these elements form a facility that is not only functional but also an example of innovative infrastructure design. While the Wynnum Sewage Treatment Plant operates largely behind the scenes, it is essential to maintaining public health, environmental protection, and the liveability of Brisbane’s eastern suburbs.

This facility highlights the importance of continued investment in essential urban infrastructure, balancing technical excellence with community and environmental responsibility.