Turning waste into something useful for a more sustainable Wellington.

Built Environs is delivering the main process building for Wellington’s new sludge minimisation facility as part of the McConnell Dowell and HEB Construction joint venture.

Less waste, lower emissions

The first facility of its kind in Aotearoa, it will transform sewage sludge produced during wastewater treatment into a stable, dry and odourless product.

Once operational, the facility will reduce sludge volumes by up to 80% each year, significantly reducing the amount of waste sent to landfill and the carbon emissions associated with its transport and disposal.

Creating value from waste

Rather than being sent to landfill, the treated product can be put to productive use, including as a soil conditioner or as fuel for industrial heat.

The facility will help Wellington reduce waste and carbon emissions, support cleaner waterways and deliver a more sustainable approach to managing wastewater by-products.

Up to 80% less sludge each year, turning waste into a product that can be put to productive use