Pukekohe Wastewater Treatment Plant

Advanced bioreactor technology helps us to build better, not bigger.

When completed in 2022, the Pukekohe Wastewater Treatment Plant will be one of the most advanced facilities of its type in the country. Indeed, the plant – built through an integrated joint venture – was described as “industry transforming” by CCNZ,  and recognised with a Highly Commended award at the CCNZ Hirepool Construction Excellence Awards 2021.

Our work
Accommodates complex resource consent requirements, including working in a live operational environment, limited construction space and an accelerated timeline to complete the first phase of the upgrade.

Contract split into two separable portions to effectively transition from the existing plant to the upgraded plan and included the construction, commissioning and handover of:

• New inlet works
• New activated sludge reactor
• Membrane bioreactor
• New ultra-violet disinfection system
• Retrofit of existing reactors

Stages 3 through 5 (separable portion B) include the retrofitting of “two existing sludge bioreactors  to create two new activated sludge reactors.

Separable portion A was successfully delivered in April 2021.