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05 November 2025 | Story Martinette Brits | Photo Supplied
Opus Cactus
Prof Maryna Boshoff from the Department of Sustainable Food Systems and Development, Lerato Mamabolo (UFS graduate, now employed at OPUS Cactus), and Sotirios Pilafidis, Head of Research and Development at OPUS Cactus, at the XI International Congress on Cacti as Food, Fodder and Other Uses, hosted by the FAO-ICARDA CactusNet in Tenerife, Canary Islands.

The University of the Free State (UFS) has formalised a collaboration with OPUS Cactus, a pioneering biotech company focused on sustainable cactus-based farming and biorefineries in semi-arid regions. This partnership builds on OPUS Cactus’ expansion at the historic Waterkloof Research Station near Bloemfontein and combines the UFS’ academic expertise with industry innovation to promote climate-smart agriculture and economic development.

OPUS Cactus, led by Joeri van den Bovenkamp-Hofman, CEO, and Sotirios Pilafidis, Head of Research and Development (R&D), specialises in transforming marginal, non-arable land into productive, resource-efficient ecosystems by cultivating the drought-tolerant Opuntia cactus. This versatile biomass supports renewable bioenergy, animal feed, food production, fermentation feedstock, and sustainable biomaterials, while contributing to carbon capture and climate mitigation efforts.

“Our mission is to unlock the full potential of Opuntia biomass for sustainable bioenergy, food, and biomaterials, advancing regenerative agriculture and climate action,” says Van den Bovenkamp-Hofman. OPUS Cactus operates dual hubs: its headquarters and R&D lab in Groningen, the Netherlands, and the flagship 1 000-hectare Waterkloof Research Centre in the Free State. The Waterkloof facility serves as a commercial farm, research platform, and demonstration site for regenerative farming techniques.

The UFS collaboration involves multiple departments, including Sustainable Food Systems and Development, Soil, Crop and Climate Sciences, and Microbiology and Biochemistry. Profs Maryna Boshoff and Carlien Pohl-Albertyn, alongside Dr Gesine Coetzer, provide academic leadership in the partnership.

Prof Boshoff explains, “This industry-academia collaboration aims to develop innovative projects utilising cactus-based products. It builds on decades of cactus research at the UFS, enabling the translation of scientific knowledge into real-world impact through scale-up and commercialisation.”

 

Bridging academic research and commercial innovation to promote climate-smart agriculture

At the core of the partnership is the Waterkloof Research Centre, home to 42 spineless Burbank cactus pear cultivars. The facility acts as a ‘living laboratory’, integrating empirical research with commercial-scale farming. “Waterkloof now offers students and researchers access to operational infrastructure that cannot be replicated in conventional academic settings,” says Prof Boshoff.

Continuing projects at Waterkloof include biogas production through an anaerobic digester, regenerative agriculture practices such as cover cropping and reduced tillage, advanced plant biotechnology to breed superior cultivars, fermentation research for alternative proteins, and the development of novel fermented foods and sustainable biomaterials.

The collaboration also plays a critical role in conserving Opuntia genetic diversity and evaluating cultivars across South Africa’s varied agro-ecological zones. “Research done by UFS and ARC scientists on cultivar selection and cultivation is applied and scaled up through OPUS Cactus’ commercial operations,” Prof Boshoff adds.

This partnership provides valuable hands-on experience and career pathways for postgraduate students and young researchers. “We offer internships and employment opportunities, with several recent UFS graduates already joining our R&D team,” says Pilafidis. “We actively seek motivated graduates passionate about sustainable agriculture and bioengineering.”

By converting semi-arid landscapes into productive, carbon-sequestering ecosystems, the UFS-OPUS Cactus collaboration exemplifies how scientific innovation, entrepreneurship, and environmental stewardship can drive climate resilience, food security, and sustainable economic growth.

“OPUS Cactus is a win for the environment, communities, and business alike,” concludes Van den Bovenkamp-Hofman.

News Archive

Three receive PhD degrees in Architecture at Winter Graduation ceremony
2015-07-08

Dr Hendrik Auret, Dr Gerhard Bosman and Dr Madelein Stoffberg.
Photo: Leonie Bolleurs

Three graduates from the University of the Free State’s (UFS) Department of Architecture received their PhD degrees at the 2015 Winter Graduation ceremony on the Bloemfontein Campus. According to Prof Walter Peters from Architecture, this is the first time in the history of the UFS that three PhD degrees in Architecture have been awarded simultaneously. It is country-wide a rare occurrence for three PhDs to be awarded in Architecture at one graduation ceremony.

“Previously, the UFS has only ever awarded a single PhD in Architecture, and that was in 1987, to Leon Roodt, a former head of the department. The first UFS honorary doctorate in Architecture was conferred on Gerard Moerdijk, architect of the Afrikaner church and the Voortrekker Monument. Gawie Fagan and Prof Bannie Britz, late head of the Department of Architecture, were other recipients of an honorary doctorate in Architecture,” said Prof Peters.

At the 2015 Winter Graduation ceremony, the UFS conferred PhDs in Architecture on Hendrik Auret from Roodt Architects in Bloemfontein as well as on Gerhard Bosman, and Madelein Stoffberg from the UFS Department of Architecture.

Dr Hendrik Auret

As an Architecture student at the university, Dr Auret obtained the degree BArchStud in 2004, a BArchStud (Hons) in 2005, and a March (Prof) in 2006, all cum laude. His Master’s design dissertation was judged the best from all South African Architecture learning sites, earning him the coveted ‘Corobrik Architectural Student of the Year’ award.

The work of the Norwegian architect and theorist, Christian Norberg-Schulz, served as the basis of Dr Auret’s PhD thesis, Care, place and architecture: a critical reading of Christian Norberg-Schulz’s architectural interpretation of Martin Heidegger’s philosophy, which considered the cogency of Norberg-Schulz’s architectural ‘translation’ of the German philosopher Heidegger’s thinking.

Dr Gerhard Bosman

On obtaining his BArchStud. and BArch degrees at the university in 1993 and 1995 respectively, Dr Bosman immediately joined the part-time staff of the Department of Architecture. As a lecturer in Building Construction, he developed an interest in vernacular and indigenous methods and techniques. Consequently, he built the first family home in Bloemfontein, for his wife, Debbie, and their two children, of earth construction, which been previously but erroneously considered inferior.

Despite that negative perception, Dr Bosman persuade the university to allow him to undertake post-graduate studies at the International Center for Earth Architecture (CRATerre-ENSAG) within the Ecole d' Architecture de Grenoble, France, from which institution,he was awarded the DPEA-Architecture de Terre qualification in 2000. In 2001,Dr Bosman was appointed to the full-time staff.

In 2003, when the opportunity arose, he became involved with SANPAD, the South Africa-Netherlands Research Project on Alternatives in Development, which lead ultimately to his PhD thesis: The acceptability of earth-constructed houses in central areas of South Africa.

Dr Madelein Stoffberg

In 2005, Dr Stoffberg enrolled as an Architecture student at the UFS, obtaining her BArchStud degree in 2007, the BArchStud (Hons) in 2008 and the March (Prof) in 2009, the latter cum laude. Immediately on graduating, Dr Stoffberg was appointed to her position as a part-time junior lecturer in the Department of Architecture.

During her studies, her attention was drawn to the concept of the spatial triad of Henri Lefebvre. Fascinated with the conceptand by the development of community centres as a contemporary architectural typology, she began her PhD degree.  

Entitled Lived reality, perception and architecture: two community centres interrogated through the lens of Lefebvre’s spatial triad, Dr Stoffberg investigated the relationship between the spatial understanding of the project architect and the community of two completed buildings in Port Elizabeth. She established a mismatch in perception, representation, and use of space, which could be bridged, however, by way of a qualitative research approach, instead of a quantitative one.


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