AWMA’s involvement in the Mangere BNR upgrade project included the design, manufacture, supply and installation supervision of 24 stainless steel Penstocks.
Watercare are New Zealand’s largest water utility. This was one of many major infrastructure projects Watercare will deliver to accommodate Auckland’s growth including: Central Interceptor project, Hunua 4 Section 11, North Harbour No2 Watermain and Northern Interceptor, a replacement for Huia Water Treatment Plant and Warkworth/Snells Beach wastewater upgrades and Clarks Beach sub-regional upgrades.
This construction project was a joint venture, employing many small-medium contractors and suppliers. Principal contractors were: HEB Construction and McConnell Dowell.
AWMA provided the design, manufacture, factory testing, delivery, site supervision and commissioning assistance for 24 Penstocks.
- 6 off Grade 316 stainless steel AWMA TLF penstocks inclusive of extended spindle supports, handwheel operation via rising spindle and right angle bevel gearbox.
- 14 off Grade 316 stainless steel AWMA TLF penstocks inclusive of SMC pneumatic actuators and control cabinets.
- 2 off Grade 316 stainless steel AWMA DLF penstocks inclusive of Rotork IQ series 415VAC electric actuators.
- 2 off Grade 316 stainless steel AWMA DLF penstocks inclusive of Rotork IQ series 415VAC electric actuators.
The penstocks were required throughout the Mangere system to isolate and allow the flow of fluid. All penstocks utilised shall be for the purpose of channel or tank isolation.
All Penstocks were supplied in accordance with Watercare’s Penstock Specifications MO24, and internationally recognised ISO 9001 Quality Management Certification.
Please find the official Watercare press release below:
The official opening of the new Biological Nutrient Removal facility at Watercare’s Māngere Wastewater Treatment Plant takes the plant into a new era, adding treatment capacity for a further 250,000 residents, as Auckland’s population grows.
On Friday (1 June), Auckland Mayor, Phil Goff and 40 assembled guests braved the early morning winter chill and climbed to the top of a stairwell overlooking a grid of new clarifiers. They included Auckland councillor Alf Filipaina and Māngere-Otahuhu Local Board chair Lydia Sosene, representing local government. Iwi representatives included Te Warena Taua of Te Kawerau iwi and Kowhai Olsen.
The Mayor sent a radio message to the control room to ‘start up the blowers’, sending draughts of compressed air into the reactors and activating the treatment process.
Millions of microbes bubbled in the water below, as His Worship paid tribute to the team behind this new $141 million facility: “We can all be proud of this new facility—which is the biggest wastewater infrastructure project in Australasia at this time.
“Auckland is due to grow by 1 million in the next 30 years. The new BNR facility means not only will this cater for growth, it will help the environment as well by ensuring the highest quality treated wastewater continues to be discharged to the Manukau Harbour.”
The project was delivered by a joint venture between McConnell Dowell and HEB Construction. Earthworks began in late 2013 and at its height, up to 250 contractors a day were on site. The new facility includes two new four-stage treatment reactors, two new 52-metre diameter clarifiers and associated pump stations, pipes and blower facilities.
Watercare chief executive Raveen Jaduram, paid tribute to the many Watercare staff and contractors who worked on the new facility: “The project has gone extremely well despite some torrential rain we experienced last year, providing some testing conditions for everyone involved.
“Watercare’s has a $5.5 billion capital infrastructure investment forecast during the next 10 years, showing our commitment to improving water and wastewater services for the people of Auckland for many years to come.”
The new BNR facility was built on land adjacent to the existing plant. In order for work to take place, a new road linking Ascot Road and Puketutu Island had to be constructed. The public has benefitted too, with the creation of a new pathway between the hugely popular Watercare Coastal Walkway and Greenwood Road Park.
Watercare has carried out extensive planting in the area as part of the Māngere Coastal Restoration project in early 2000s. With BNR construction more landscaping and planting of 100,000 native plants was done to complement the facility, which lies to the south of the existing Māngere treatment plant.
Both Māngere and Rosedale wastewater treatment plants use primary (mechanical), secondary (biological) and tertiary (filtration and ultraviolet radiation) methods to treat wastewater before it’s discharged into the Manukau and Waitematā Harbours. -ENDS-
AWMA PRODUCTS MANUFACTURED FOR THIS PROJECT INCLUDE:
