• Client: Watercare Services Limited
  • Year: 2010-2011

The project primarily involved installation of 2 large, client supplied centrifuges and 7 spiral conveyor systems at New Zealand's largest Waste Water Treatment Plant at Mangere.


This included design, supply and installation of sludge and polymer pumps and associated delivery systems including pipe work, valves, flow meters and mixers.  Approved detailing and design was required before fabrication of all the associated support and access structures.  The project included de-commissioning and removal of old conveyors, equipment and access walkways. This was all planned and timed to simultaneously maintain the plants capacity and capabilities.  The refurbishment and relocation of lime day tanks and transfer conveyors was also completed.  Modifying the overhead gantry in the dewatering building allowed the new larger centrifuges (3x larger) to be lifted in through the roof.  A new mezzanine floor was detailed and built providing a larger work area.


In addition to the technical demands of the project other significant challenges involved co-ordinating not only our own construction crews and subcontractors but co-ordinating with the main equipment suppliers who were responsible for their parts during commissioning in a live operating plant environment.



Mangere WWTP CAASU - Gallery