23/10/2026
What happens to wastewater after it goes down the drain?
At the Seaview Wastewater Treatment Plant, treating wastewater also produces sludge that needs to be managed. Drying it removes water and reduces its volume before it’s taken to landfill.
The problem is that Seaview’s existing dryer is ageing and prone to breakdowns. When it’s out of action, wet sludge has to be transported off-site instead, increasing the risk of unpleasant odour for the surrounding community.
That’s why we’re replacing it with two new thermal sludge dryers.
Work started yesterday on the main building that will house the new dryers, which are on their way from Germany.
The new dryers will have their own dedicated odour management system, helping reduce the risk of odour associated with wet sludge. With two dryers, one can keep operating while the other is being maintained or repaired. The new dryers will use electricity instead of natural gas.
This is a significant investment in the infrastructure our communities rely on. In the 2026/27 year, we’re investing $228 million in renewing ageing and failing water services assets across the region.
The Seaview project is also supporting local businesses, with 19 New Zealand suppliers and subcontractors involved.
The new dryers are on track to be operational by the end of 2027. 💧
