At the turn of the millennium, Professor Emile van Zyl, a pioneering microbiologist, embarked on a mission to propel research and training in biofuels at Stellenbosch University (SU). Recognizing the urgent need for sustainable alternatives to fossil fuels, Van Zyl sought to gather expertise, drive research outputs, and build human capital to support the burgeoning biofuels industry in South Africa and beyond. His vision was clear: it could no longer be business as usual in the face of escalating climate change and pollution.
Van Zyl’s focus shifted toward second-generation biofuels, driven by concerns over food security that had curtailed the global use of first-generation technologies. He concentrated on developing processes to produce biofuels from non-edible sources, such as sugar bagasse, invasive plants, fruit pulp, and paper mulch. These sources, abundant and low-cost, offered the added benefit of reducing agricultural and forestry waste in South Africa.
In 2007, Van Zyl was appointed to the SANERI Chair of Energy Research, a position funded by the South African National Energy Research Institute (SANERI), now known as SANEDI. He assembled a team of experts, including fellow SU microbiologist Prof Marinda Viljoen-Bloom, chemical engineers Prof Hansie Knoetze and Prof Johann Görgens from SU, and Prof Harro von Blottnitz from the University of Cape Town. This interdisciplinary team was tasked with bridging the gap between lab-based research and industrial application.
Significant Research Achievements
Over the next 15 years, the team made significant strides in biofuel research. They developed second-generation technologies through microbial hydrolysis and fermentation of lignocellulosic feedstocks, tested various methods of pretreatment, and advanced pyrolysis and gasification technologies. Their efforts resulted in 16 patents and 286 accredited papers, contributing significantly to the field.
Despite these achievements, the commercial rollout of second-generation biofuel plants has been slow, both in South Africa and globally. High capital costs, energy demands, and the need for expensive enzymes have deterred investors, leaving only a few experimental prototype plants operational worldwide.
Shaping the Next Generation of Scientists
Nevertheless, the team persisted, shifting their focus to new research areas, such as bioplastics recycling and the conversion of agricultural waste into high-value organic fatty acids. In 2023, Görgens led the establishment of a demonstration plant at a paper mill in KwaZulu-Natal, showcasing the practical application of their research.
Continuing the Quest for Sustainable Energy
Beyond research, the Chair’s greatest legacy lies in the training and development of young scientists. Over 15 years, the program supported 33 honours, 92 masters, 39 doctoral, and 27 postdoctoral graduates. Many of these graduates have gone on to successful careers in academia, research, and industry, both locally and internationally, underscoring the lasting impact of Van Zyl’s vision and leadership.
As the world continues to grapple with the challenges of climate change, the work initiated by Van Zyl and his team remains a vital part of the ongoing quest for sustainable energy solutions.
