WWTF Hautapu
Case Study

WWTF Hautapu

Case Study

WWTF Hautapu

Throughout the project, we applied proven technologies and worked as part of a team of industry-recognised specialists, ensuring a robust and reliable solution that meets long-term performance and compliance goals.

A leading New Zealand dairy co-operative partnered with TEG Projects to oversee the design, construction, and commissioning of advanced wastewater treatment infrastructure as part of a multi-year capital works programme exceeding $100 million. The project involved implementing a tertiary treatment process to support evolving environmental goals by reducing nutrient and solid loads, improving overall water quality, and enhancing system efficiency.

WWTF Hautapu Project Managed by TEG Projects
WWTF Hautapu Project Managed by TEG Projects
WWTF Hautapu Project Managed by TEG Projects
WWTF Hautapu Project Managed by TEG Projects

    Client Information

    Goal

    Why TEG Projects

    Solution

    Challenges

    Results
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    Client Information

    A major New Zealand-based dairy co-operative operates one of the world’s largest dairy supply chains, exporting around 95% of its production to more than 130 countries. Its operations encompass large-scale milk collection, advanced processing facilities, and a global logistics network.

    Goal

    The project was part of a broader five-year wastewater portfolio implemented across multiple manufacturing sites throughout New Zealand. Its goal was to replace aging assets with purpose-built facilities designed to meet new resource consent limits by significantly reducing nutrients, solids, and bacteria in processed wastewater before final distribution. The solution incorporated a tertiary treatment process comprising DAF pretreatment, biological treatment, filtration, disinfection, decanting, and biosolids loadout.

    Why TEG Projects

    The project was part of a broader five-year wastewater portfolio implemented across multiple manufacturing sites throughout New Zealand. Its goal was to replace aging assets with purpose-built facilities designed to meet new resource consent limits by significantly reducing nutrients, solids, and bacteria in processed wastewater before final distribution. The solution incorporated a tertiary treatment process comprising DAF pretreatment, biological treatment, filtration, disinfection, decanting, and biosolids loadout.

    Solution

    TEG team members played an integral role in managing project delivery timelines and building strong relationships with key internal and external stakeholders, operating as a trusted project delivery partner. The team managed external design parties through early feasibility and approvals, contributing to both process and civil engineering development while ensuring alignment with the client’s project delivery and engineering standards. They also prepared contracts in accordance with FIDIC and NZS3916 standards, evaluated tender submissions, and oversaw contract administration. In addition, TEG managed construction and commissioning activities on behalf of the client.

    Challenges

    A diverse group of stakeholders required active engagement throughout the project lifecycle, including private entities, developers, councils, contractors, and international suppliers. The TEG team managed delivery risks across work packages and ensured compliance with engineering, environmental, and quality standards through proactive management and close coordination with the project governance team. By anticipating challenges and maintaining open lines of communication, TEG helped deliver this complex, multi-stakeholder project successfully.

    Results

    The project successfully met the client’s objectives by delivering a series of upgraded and newly constructed wastewater treatment plants across its dairy manufacturing sites. Aging assets were replaced with modern, purpose-built facilities designed to support long-term performance and environmental compliance.

    Significant improvements were achieved in effluent quality, effectively reducing nutrients, solids, and bacteria in processed wastewater to meet updated resource consent requirements. The adopted tertiary treatment process enabled the client to maintain high operational standards while aligning with evolving regulatory expectations.

    Delivered on time and under budget, the project achieved its environmental and operational readiness goals. TEG’s contribution was instrumental in ensuring regulatory compliance and operational performance, and the team continues to support the client as part of their ongoing wastewater portfolio.

    This outcome reflects TEG’s commitment to delivering practical, fit-for-purpose engineering solutions that balance environmental responsibility with operational efficiency.

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    Project Management

    Project
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    Construction Project Management

    Construction
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    Programme Management

    Industrial Plant Services

    Safety Engineering

    Safety
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    Risk Management

    Risk
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    Feasibility Studies & Master Planning

    Feasibility Studies
    & Master Planning