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10 June 2025 | Story Leonie Bolleurs | Photo Supplied
Anita Venter
According to Dr Anita Venter, eco-bricks help prevent further environmental degradation, a theme often highlighted by World Environment Day.

Students filling plastic bottles with tightly packed wrappers, chips packets, and cling wrap until they are sturdy may not look like revolutionaries, but that is exactly what they are. This Eco-Bricks initiative is a grassroots effort that transforms plastic waste into construction material, sparking environmental change from the ground up. From there, the possibilities multiply – from benches to buildings, and from awareness to action.

It is not just about just stuffing bottles; it is about shifting mindsets.

Dr Anita Venter, Lecturer in the Centre for Development Support at the University of the Free State (UFS), believes eco-bricks directly address the urgent need for solutions to plastic pollution. “By taking plastic out of the waste stream and giving it a new, useful life, we're actively participating in ecosystem restoration and preventing further environmental degradation, a theme often highlighted by World Environment Day.”

However, the Eco-Bricks project is doing more than managing waste. “Beyond this practical application, it serves as a powerful community development tool, empowering individuals to take control of waste management and fostering a vital environmental consciousness.”

And while we can dream of a plastic-free world, Dr Venter is grounded in today’s realities. “So, my approach is that I'd rather have plastic contained safely within a bottle – repurposed in a regenerative way – than seeing it break down into nano-plastics, poisoning our earth. This project is about finding practical solutions within our current reality.”

 

A no-cost solution 

Dr Venter does not lead from a podium; she is mentoring from the sidelines. “I'm primarily involved in mentoring our student champions. They are the real drivers, facilitating the eco-brick training peer-to-peer. It's about empowering them to spread the knowledge and skills, rather than me being the sole instructor. It’s a beautiful ripple effect.”

And ripple it does. “These initiatives continue in their communities, and that truly warms my heart,” she says. The students are taking the lessons home, creating a chain reaction of action and awareness. “It’s not just about building bricks; it’s about inspiring continued action.”

The concept’s biggest success story? Thousands of eco-bricks being used by the Natural Building Collective in the Western Cape for formalised buildings. Proof that what was started by students can reshape entire landscapes.

“I see eco-bricks as an incredible community development tool. What’s beautiful about it is that it’s a no-cost activity. Anyone who wants to start a community development initiative can pick it up, and they immediately reap the dual benefits of cleaning their environment and taking control of their own waste management. It’s very empowering on a grassroots level.”

 

Regeneration starts here

Dr Venter, who has been part of the initiative since 2013, sees it as integral to her broader environmental work as climate activist focusing on research related to housing, informal settlement upgrading, culture, socio-ecological development, regenerative design, and art. She is quick to connect plastic pollution to the deeper ecological crisis we face. “Plastic is a monumental environmental problem, rapidly leading to biodiversity collapse, which I honestly believe is a far more pressing issue than even the climate crisis itself. It’s stark – babies are now born with plastic in their tiny bodies, and these microplastics are found in every human organ. It’s a pervasive crisis.” 

With students and community leaders now steering the project, she is hopeful about the future: “The beauty of something so accessible and practical is that it doesn’t need top-down direction; it flourishes from the ground up as people recognise its value and adopt it.”

Dr Venter’s commitment to making waste meaningful goes well beyond the Eco-Bricks initiative. In the project What Remains Through Time, Slowness and Stillness, waste is transformed into meaningful art, and communities step into the role of co-creators. 

Using post-natural building techniques, the project incorporates both waste and natural materials, marrying ecological restoration with social transformation. Sites such as the Oliewenhuis Art Museum, Bloemfontein National Hospital, and Sekoele Holistic Living Arts Centre serve as hubs where participants can engage hands-on, learning new skills while strengthening their communities.

According to Dr Venter, the main activities at Oliewenhuis are from June to September this year. Here, the focus is on community collaboration and regenerative art that goes far beyond constructing physical spaces. “We’re aiming to break down social barriers and make art truly accessible and inclusive within public spaces. It’s as much about building community as it is about building structures,” she says.

So, what can you do?

Start where you are. Join an eco-brick or art-for-regeneration initiative. “Go beyond sustainability! We need to regenerate, to ‘renew, restore, revitalise’,” says Dr Venter. Attend a training event. Share what you learn. “That’s how we create real, lasting change – through shared knowledge and empowered action.”

News Archive

Researcher part of project aimed at producing third-generation biofuels from microalgae in Germany
2016-05-09

Description: Novagreen bioreactor  Tags: Novagreen bioreactor

Some of the researchers and technicians among the tubes of the Novagreen bioreactor (Prof Grobbelaar on left)

A researcher from the University of the Free State (UFS), Prof Johan Grobbelaar, was invited to join a group of scientists recently at the Institute for Bio- and Geo-Sciences of the Research Centre Jülich, in Germany, where microalgae are used for lipid (oil) production, and then converted to kerosene for the aviation industry.

The project is probably the first of its kind to address bio-fuel production from microalgae on such a large scale.  

“The potential of algae as a fuel source is undisputed, because it was these photoautotrophic micro-organisms that were fixing sunlight energy into lipids for millions of years, generating the petroleum reserves that modern human civilisation uses today.  However, these reserves are finite, so the challenge is marrying biology with technology to produce economically-competitive fuels without harming the environment and compromising our food security.  The fundamental ability that microalgae have to produce energy-rich biomass from CO2, nutrients, and sunlight through photosynthesis for biofuels, is commonly referred to as the Third-Generation Biofuels (3G),” said Prof Grobbelaar.

The key compounds used for bio-diesel and kerosene production are the lipids and, more particularly, the triacylglyserols commonly referred to as TAGs.  These lipids, once extracted, need to be trans-esterified for biodiesel, while a further “cracking” step is required to produce kerosene.  Microalgae can store energy as lipids and/or carbohydrates. However, for biofuels, microalgae with high TAG contents are required.  A number of such algae have been isolated, and lipid contents of up to 60% have been achieved.

According to Prof Grobbelaar, the challenge is large-scale, high-volume production, since it is easy to manipulate growth conditions in the laboratory for experimental purposes.  

The AUFWIND project (AUFWIND, a German term for up-current, or new impetus) in Germany consists of three different commercially-available photobioreactor types, which are being compared for lipid production.

Description: Lipid rich chlorella Tags: Lipid rich chlorella

Manipulated Chlorella with high lipid contents (yellow) in the Novagreen bioreactor

The photobioreactors each occupies 500 m2 of land surface area, are situated next to one another, and can be monitored continuously.  The three systems are from Novagreen, IGV, and Phytolutions.  The Novagreen photobioreactor is housed in a glass house, and consist of interconnected vertical plastic tubes roughly 150 mm in diameter. The Phytolutions system is outdoors, and consists of curtains of vertical plastic tubes with a diameter of about 90 mm.  The most ambitious photobioreactor is from IGV, and consists of horizontally-layered nets housed in a plastic growth hall, where the algae are sprayed over the nets, and allowed to grow while dripping from one net to the next.

Prof Grobbelaar’s main task was to manipulate growth conditions in such a way that the microalgae converted their stored energy into lipids, and to establish protocols to run the various photobioreactors. This was accomplished in just over two months of intensive experimentation, and included modifications to the designs of the photobioreactors, the microalgal strain selection, and the replacement of the nutrient broth with a so-called balanced one.

Prof Grobbelaar has no illusions regarding the economic feasibility of the project.  However, with continued research, optimisation, and utilisation of waste resources, it is highly likely that the first long-haul flights using microalgal-derived kerosene will be possible in the not-too-distant future.

Prof Grobbelaar from the Department of Plant Sciences, although partly retired, still serves on the editorial boards of several journals. He is also involved with the examining of PhDs, many of them from abroad.  In addition, he assisted the Technology Innovation Agency of South Africa in the formulation of an algae-biotechnology and training centre.  “The chances are good that such a centre will be established in Upington, in the Northern Cape,” Prof Grobbelaar said.

 

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