Australia and New Zealand are facing a familiar challenge: how to support growing populations and economies without exhausting finite resources or overwhelming the environment with waste.  

Each year Australia generates around 75 million tonnes of waste, equating to almost three tonnes per person. While recovery rates have improved, many materials are still used once and discarded. This linear take–make–dispose model of production has underpinned industrial growth for decades, but it is increasingly misaligned with the environmental, economic and social outcomes our communities expect.

The circular economy offers a different pathway. Rather than treating waste as an unavoidable by‑product, it reframes waste as a resource, keeping materials and energy in productive use for as long as possible. Importantly, this isn’t just an environmental ideal, it is fast becoming a practical, investable model for infrastructure, industry and local communities.

What is the Circular Economy?

Fundamentally, the circular economy seeks to separate economic development from the reliance on raw material consumption. It does this by:

• Designing products and infrastructure for durability, reuse and recovery
• Recovering materials, nutrients and energy at end of life
• Re‑introducing those outputs back into productive use

This approach differs from the traditional linear take–make–dispose model, where resources are extracted, turned into products, and then, along with production by-products, ultimately discarded after use or end up polluting the environment. 

From an engineering perspective, circularity is not a single technology or solution. It is an approach, spanning design, construction, operation, maintenance and decommissioning. It requires thinking about feedstocks, process integration, logistics, regulatory frameworks and long‑term asset performance from the outset.

Australia’s national ambition is to double the circularity of the economy by 2035, recognising that current circularity rate site around 4–5%, well below global averages.

Why Governments and Industry Are Leaning In

The momentum behind the circular economy is being driven by three reinforcing forces.

From Concept to Reality: Circular Economy in Action

While the circular economy is often discussed at a conceptual level, its real impact comes through practical infrastructure projects, many of which already exist. Ventia was instrumental in a $22 million upgrade completed in 2025 of the Veolia EarthPower facility in Camellia, which is a fantastic example of circular economy principles in practice.

EarthPower: Turning Food Waste into Energy

Australia’s first commercial food waste‑to‑energy facility, EarthPower, demonstrates how established technology can deliver circular outcomes at scale.

Using anaerobic digestion, the facility processes up to 62,500 tonnes of food waste per year, converting it into biogas that fuels high‑efficiency cogeneration engines. At full capacity, the electricity produced is sufficient to power around 4,000 homes, while offsetting landfill methane emissions. 

The process does not end with energy recovery. After processing, the leftover digestate is dried and formed into granules to create a nutrient-rich soil enhancer. This process returns organic nutrients to farms and gardens, effectively recycling them. Thus food waste is diverted from landfill and instead generates electricity for tens of thousands of homes and supplies valuable fertiliser for growing more food.

Ventia supported this project through multidisciplinary detailed engineering design and safety studies for a recent major upgrade, helping ensure the facility could operate safely, reliably and in compliance with regulatory requirements. It is an example of how circular economy outcomes are often enabled not by entirely new inventions, but by thoughtful integration of proven technologies. 

How Circular Infrastructure Benefits Communities

For communities, the circular economy delivers tangible benefits:

• Reduced landfill dependence, extending landfill life and lowering environmental risk
• Local energy generation, improving resilience and reducing transmission losses
• New skilled jobs in engineering, operations and advanced manufacturing
• Lower long‑term costs through resource efficiency and reduced disposal fees
• Increase supply chain resilience through reduced dependence on material inputs

Importantly, most circular economy facilities are naturally local, producing value near the sources of waste and where infrastructure is required.

Ventia’s Role Across the Asset Lifecycle: Together we go Further

As a major infrastructure services provider across Australia and New Zealand, Ventia’s contribution to the circular economy is less about owning technologies and more about enabling them to succeed.

Across the asset lifecycle, this includes:

• Engineering and design: supporting pilot‑to‑commercial scale‑up, integrating safety, operability and lifecycle thinking from the outset
• Capital works and delivery: managing complex builds with strong environmental, safety and quality controls
• Operations and maintenance: ensuring facilities operate reliably while continuously improving efficiency and reducing waste
• Decommissioning and rehabilitation: recovering materials where possible and returning land to productive use

Ventia’s capability is critical for turning promising circular concepts into operable infrastructure.

Looking Ahead

The circular economy is still evolving and challenges remain, particularly around technology readiness, financing and coordination across value chains. But the direction is clear.

For engineers, asset owners and communities, the shift from waste to value represents one of the most significant infrastructure transitions of the coming decades. It is a transition that rewards collaboration, technical rigour and long‑term thinking.

At Ventia, supporting this transition aligns directly with our purpose: making infrastructure work for communities – now and into the future.

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