Building South Africa’s Zero Waste Future

October marks a pivotal moment in our journey through A Time of Waste. After imagining what a world without landfills could look like in September, we now begin planting the seeds that will turn that vision into reality. Planting the Seeds of Tomorrow isn’t just about ideas; it’s about cultivating systems, technologies, and collaborations today so that zero waste to landfill becomes more than aspiration – it becomes our foundation for the future.

Why Zero Waste Matters Now

South Africa generates over 122 million tonnes of waste annually, yet just about 10% of that is recycled. Our landfill space is under growing pressure, and the environmental, health, and economic costs of waste disposal are mounting. At the same time, the National Waste Management Strategy 2020 and other policy frameworks make it clear: transitioning toward circular economy models is essential, not optional. We need to rethink production, consumption, and recovery from the very first stage – and protect our planet and communities along with that.

Real Growing Points: Where Change Is Already Sprouting

South Africa isn’t just talking about the circular economy – it’s already putting it into practice. The Warwick Zero Waste pilot in Durban is a strong example. By March 2024, the initiative had diverted more than 72 tonnes of organic waste from landfill. Each week, approximately 1.5 tonnes of food waste from the Early Morning Market, collected across two drop-off points, is combined with around 1 tonne of garden waste. This material is then processed through local composting, producing nutrient-rich compost while reducing transport needs and cutting emissions.

Another strong example comes from PETCO, which continues to lead in driving plastics circularity in South Africa. According to the PETCO 2024 Annual Report, the organisation facilitated the collection and recycling of 147,959 tonnes of post-consumer PET in 2023. This achievement represents a 62% recycling rate for PET beverage bottles placed on the market, equating to more than 6.6 billion bottles diverted from landfill in a single year. Beyond reducing waste, this effort also supported thousands of income opportunities across the recycling value chain, demonstrating how extended producer responsibility can deliver both environmental and social impact at scale.

Cultivating Circular Roots

At Interwaste, we believe in putting down deep roots. Our facilities – ranging from engineered landfills, composting and recycling centres, the ETP, and the Refuse Derived Fuels Facility, are already part of the groundwork for a future where waste is a resource. We are exploring new technologies to improve processing and treatment, from mechanical pre-treatment methods to alternative fuel recovery.

We are building closed-loop systems: helping clients more effectively manage waste at source, recover materials, and reduce what ends up in landfill. Each facility, each pilot, each partner adds a new seed. With investment, policy support, and scale, those seeds will grow.

From Seeds to Systems

Planting the seeds means more than starting these projects – it means tending them, scaling them, integrating them. In practical terms, this means supporting policies that encourage extended producer responsibility (EPR), creating incentives for composting and recycling at municipal level, investing in infrastructure for material recovery, and nurturing public behaviour change.

The “seedlings” we see today – composting projects, plastic recycling growth, packaging design shifts – show what’s possible. Systems change means moving from isolated pilots to widespread, coordinated action across sectors and geographies. Only then can zero waste to landfill shift from being a vision to being standard practice.

A Future We Grow Together

If we want waste to stop defining our world, then today is the day we sow differently. The seeds of a zero-waste future are being planted across South Africa – from compost heaps in Durban, to PET bottles being reused, to packaging being redesigned. It is through this growing pattern of change, rooted in action, innovation, and collaboration, that we begin to build the future we’ve imagined.

Let us nurture these seeds: invest in circular design, support projects that recover value, partner across the waste value chain, and demand better systems. Because the zero-waste future is not something that happens by chance – it happens by choice. When we choose to grow differently, our planet, our people, and our prospects flourish.

There was a time when landfills were the final stop in a long, linear journey of consumption. But what if they weren’t? What if waste didn’t end up buried in the ground. But reimagined, repurposed, and reintegrated into the economy?

As we enter the realm of possibilities, the concept of zero waste to landfill becomes more than just a sustainability goal – it becomes a design principle for the future. One that dares to ask: what if nothing was wasted at all?

This September, we open that conversation. Because the innovations that can get us there aren’t science fiction, they’re already here, quietly transforming how we think about waste, value, and regeneration.

The Vision: A World Without Waste

In a zero waste-to-landfill future:

• Products are designed for repair, reuse, or disassembly
• Food waste fuels biogas or regenerative compost systems
• Plastics are replaced with biodegradable alternatives
• Buildings are constructed with recycled or modular materials
• Waste sorting is enhanced by AI and robotics
• Communities participate in hyper-local circular systems

It’s not perfect – yet. But it’s possible. And in South Africa, a country with limited landfill space and growing waste volumes, it’s not just a possibility. It’s a necessity.Transformative Technologies on the Rise

AI‑Powered Sorting

Robotic sorting systems powered by machine vision, such as Europe’s ZenRobotics, are boosting recovery rates in materials recovery facilities by up to 60% by identifying and extracting valuable recyclables with precision. These innovations are inspiring similar pilots for plastic and e-waste sorting in South Africa.

Design for Disassembly & Reusable Packaging

Globally, manufacturers are shifting toward product designs, like modular electronics or refillable containers, that are easier to repair or recycle. In South Africa, frameworks promoting reusable packaging and bulk bin systems are emerging, offering alternatives to single-use waste.

Waste‑to‑Energy 2.0: Pyrolysis & Gasification

Advanced thermal technologies such as pyrolysis and gasification are being piloted in South Africa, notably in Gauteng where tyre-derived waste can be processed into syngas and energy. These methods offer cleaner energy alternatives to conventional incineration.

Biodegradable & Bio‑Based Materials

Innovative packaging made from cassava, algae, or maize starch is gaining traction. These compostable materials degrade within 60–90 days, making them well-suited for municipalities with organic waste infrastructure and reducing plastic pollution.

Leading Possibility into Practice

Interwaste’s commitment to a future beyond landfill is already in motion. Our Effluent Treatment Plant set a new standard for liquid waste circularity, recovering 90% of treated effluent as reusable water, but this is just one part of a broader journey. Across our network of specialist facilities, from our composting operations and recycling centres to our engineered landfills and alternative waste treatment sites, we are continuously pushing to improve how waste is managed, processed, and recovered.

New technologies, whether in the form of thermal desorption, mechanical pre-treatment, or alternative fuels, are being explored to support diversion and resource recovery. At our Refuse Derived Fuels Facility, for example, we are extracting value from previously non-recyclable materials to reduce reliance on landfill, while exploring partnerships that support material beneficiation and energy potential.

Our vision also includes expanding closed-loop systems where businesses are supported in taking greater ownership of their waste output , whether through pre-treatment, material recovery, or more sustainable disposal routes. Through this integrated approach, we aim not only to respond to today’s waste pressures, but to build the blueprint for a circular, waste-free tomorrow.

Turning Vision into Systems Change

Technology alone won’t transform waste into sustainability – policies, systems, and communities must evolve too. South Africa’s National Waste Management Strategy 2020 has laid out goals for circular economy growth, extended producer responsibility, and resource recovery. The opportunity is in bridging pilot technologies with national policy and community action to make zero waste a reality.

The journey toward zero waste-to-landfill is not a distant dream. It is a present-day responsibility with future-shaping potential. As we open the door to the realm of possibilities, we begin to see that transformation is not only necessary, but within reach. Interwaste’s work proves that change starts with bold infrastructure, strategic partnerships, and a willingness to challenge outdated systems.

But the future we imagine will not build itself. It depends on our collective ability to act with urgency and imagination. It’s about the choices we make now, to invest in circular thinking, to adopt better technologies, to reduce and rethink at every step of the value chain.

This spring let’s step forward with intention. Let’s refuse to accept waste as the end of the story and instead make it the beginning of something better. Because when we stop asking what if and start asking what next, we find the answers we need to build a cleaner, greener, waste-free world.

South Africa’s waste landscape is changing , and the stakes have never been higher. In the Era of Responsibility, we’re no longer just reacting to environmental challenges; we’re reimagining how we prevent them. One of the most pressing issues? Liquid waste. From industrial by-products to hazardous leachate, the question is no longer where we dump it – but how we transform it.

That’s what makes Interwaste’s Effluent Treatment Plant (ETP) so significant. It’s not a future idea. It’s a present-day solution to one of South Africa’s most under-addressed waste problems, one that’s reshaping how we manage water, waste, and accountability.

The State of Water in South Africa

South Africa is one of the 30 driest countries on Earth, and its water crisis is growing more severe by the year. According to the Department of Water and Sanitation, national demand is expected to outpace supply by 17% by 2030, driven by population growth, urbanisation, and poor resource management. This stress is compounded by widespread pollution of rivers and dams through industrial effluent and untreated municipal wastewater, with over 56% of wastewater treatment works currently classified as being in poor or critical condition. Climate variability is also intensifying the crisis, particularly in drought-prone regions such as the Eastern Cape, Northern Cape, and Western Cape. Yet despite these mounting pressures, South Africa’s uptake of water reuse and recycling remains limited, leaving millions vulnerable. Recent data shows that more than 3 million people still rely on water sources considered to be below acceptable health and safety standards. In this fragile context, how we manage waste, particularly liquid waste, has become directly linked to national water security and the wellbeing of communities across the country.

Interwaste’s ETP: A Bold Step Forward

Recognising the need for meaningful intervention, Interwaste launched a first-of-its-kind Effluent Treatment Plant at its Klinkerstene site – a strategic investment designed to address both industrial and leachate-based liquid waste. The plant:

• Processes 43 million litres of liquid waste annually
• Recovers up to 90% of that as clean, reusable water
• Produces 36 million litres of water for safe reuse or compliant discharge
• Meets and exceeds Department of Water and Sanitation discharge requirements

Unlike conventional treatment works, the ETP is built to manage complex waste streams – from acidic effluents and heavy metals to chemical runoff – ensuring that water is recovered without harming downstream environments.

A Model for the Present – and the Sector

The ETP is a blueprint for how the waste sector must evolve in this new era. It is environmentally responsible, protecting wetlands, aquifers, and downstream rivers from hazardous waste. It is economically efficient, reducing reliance on municipal water supply during an era of rolling shortages. It is regulator-aligned, supporting the national ban on liquid waste to landfill (effective 2019) and aligns with the National Waste Management Strategy 2020. And perhaps most importantly, it is circular in mindset – turning “waste” into water, one of our most critical resources.

In a country where over 60% of landfill sites do not have leachate treatment infrastructure, this level of intervention sets a new benchmark.

The Bigger Picture: One Plant, Many Lessons

While the ETP is a milestone, it’s not the only solution. South Africa’s waste challenges – particularly around water, require a multipronged approach. This includes increased public-private collaboration, decentralised community-based treatment, incentives for industrial water reuse, and improved regulatory enforcement.

Yet the ETP stands as proof that when we stop waiting for ideal conditions and start innovating within constraint, we unlock new pathways to sustainability.

Reimagining Waste, Reimagining Responsibility

To reimagine waste is to rethink what’s possible. In the Era of Responsibility, it is no longer enough to acknowledge the problem – we must act. Interwaste’s Effluent Treatment Plant is more than a facility; it’s a symbol of progress, proving that even the most complex waste streams can be transformed into value.

But true impact lies in replication, collaboration, and sustained momentum. A single innovation will not fix the system, but it can spark the movement needed to change it. By investing in solutions that restore, recover, and reimagine, we move beyond intention into impact.

Let this be the moment we stop treating water and waste as separate issues. Let it be the moment we choose to lead, innovate, and take accountability, not just for today, but for generations to come.

Waste is no longer something to discard. It is something to solve.