Te Whare Wai Para Nuku

We’re proud to be delivering Te Whare Wai Para Nuku, alongside our joint venture partner McConnell Dowell. This first-of-its-kind facility in Aotearoa is set to transform how we manage wastewater. This project is a huge leap for sustainability and resilience, helping Te Whanganui-a-Tara (Wellington) move closer to a zero-waste, net-zero carbon future.

Our client, Wellington City Council, wanted a world-class solution that would dramatically reduce landfill waste and carbon emissions. The facility is designed to cut sludge volumes by up to 80%, reduce emissions by 60%, and produce a stable, low-odour product that can be used for fuel, or to improve soil health .

The works include two 16-metre-high digesters, a 26-metre-tall processing building, 8,300 metres of new process pipework, and 2,100 valves linked by 75,000 metres of cabling. Using thermal hydrolysis and anaerobic digestion, the plant will convert over a million litres of sludge a day into dry, odourless pellets, while capturing biogas to generate electricity for the facility itself.

Once complete, Te Whare Wai Para Nuku will help Te Whanganui-a-Tara meet its climate goals, protect the environment, and create new opportunities for resource recovery. It’s a win for the city, and the wider community, setting a new benchmark for sustainable infrastructure in Aotearoa.