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Wellington Wastewater Treatment Plant - Delivering value to the community whilst minimising cost


In 1998, Wellington City Council awarded Veolia a contract incorporating asset management as well as operations and maintenance of wastewater treatment facilities under a long term design-build-operate contract.

Wellington Wastewater Treatment Plant
 

THE CHALLENGE

New Zealand’s capital city, Wellington, is located in the southern tip of the North Island. Wellington City Council is responsible for providing wastewater treatment for industry, business and residences throughout the Wellington region.

The Wellington Wastewater Treatment Plant is the largest of its kind in Wellington, New Zealand; and also holds some of the tightest odour consent of any treatment system in the country. Serving a population of 188,000, the location and extreme weather conditions also offer their own unique challenges.

With a focus on protection of public health, re-use of treated wastewater and minimising odour, the Council required a partner to design, build, operate and maintain Moa Point and Western wastewater treatment plants as well as a sludge dewatering plant, sludge transfer pipeline and outfall pipe.
 

THE SOLUTION

In 1998, Wellington City Council awarded Veolia a contract incorporating asset management as well as operations and maintenance of wastewater treatment facilities under a long term design-build-operate contract.
To ensure wastewater requirements were met, Veolia designed and constructed the Moa Point and Western wastewater treatment plants – two modern facilities to ensure discharge to Cook Straight is managed to a high standard.

Veolia has partnered with Wellington for a number of years, operating and maintaining two wastewater treatment plants, a dewatering facility, as well as a centrate processing plant (since 2004). Veolia has assisted in the continued improvement and performance of the plant, in parallel to identifying sustainability initiatives which maximise the value for the local community.

The subsequent increase in the health of the coastal region as a result of the plants’ operations has led to the establishment of the Wellington Taputeranga Marine Reserve.
 

THE RESULT

Veolia has maintained exceptional contractual and resource consent compliance since 2004; demonstrating Veolia’s ability to plug-in its innovative solutions to meet resource consent requirements whilst optimising the costs associated with services, such as electricity, water and chemicals.
  • Minimised cost and maximised value for the Wellington community by tariffs based on flow and load through wastewater treatment plants.
  • Collection of data at every asset interaction as well as preparation and implementation of an asset management plan. The deployment of a reliability centred maintenance program improves understanding of asset performance and replacement schedules.
  • Environmental benefits of recycled water available as an irrigation source, with re-use of treated wastewater onto the local golf course.
  • Observing strict odour control regulations ensures good management to minimise complaints from the community. This has resulted in 100% achievement of no discernible odour from the Moa Point wastewater treatment plant.
 

KEY FIGURE

  • 188,000 population served
  • Moa Point treats 259,000 m3/day of wastewater
  • Western treats 17,000 m3/day of wastewater