Early contractor involvement by Apex Water allowed a collaborative approach to be taken for delivery of this critical part of the overall project, which required all wastewater to be sterilised through heat treatment to ensure no biosecurity risk to New Zealand as a result of the discharge to the Council sewer.  

This represented a unique and highly-specific wastewater treatment requirement.

The solution designed and installed by Apex Water included a sump to receive all wastewater flows from the IPEQ facility, a wastewater holding tank providing three days of emergency storage and a pasteuriser unit complete with discharge heat exchanger. The pasteuriser ensures all wastewater is heated to a minimum of 95⁰C for a minimum of 30 seconds, as per MPI specifications before it is cooled via a heat exchanger to under 400C and discharged to sewer under a trade waste discharge permit. The entire process is highly automated, including re-processing of wastewater should specificastions not be met.

Drawing on our experience in the design and construction of water and wastewater plants for municipal and industrial clients, design and placement of the wastewater sump required careful consideration to ensure all wastewater flows from the facility were captured and contained.

Read further details here Business North April 2025