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UFS welcomes GeoCongress 2025 delegates

02 June 2025 | Story Leonie Bolleurs | Photo Supplied

Dr Martin Clark, chair of the local organising committee, is looking forward to welcoming delegates to the GeoCongress.

In just more than three weeks, the University of the Free State (UFS) will open its doors to delegates attending GeoCongress 2025, hosted in collaboration with the Geological Society of South Africa. From 23 to 27 June 2025, academics, industry professionals, and students will come together on the Bloemfontein Campus to share knowledge, discuss new research, and connect with peers in the geosciences.

This biennial event will feature a dynamic programme of workshops, keynote addresses, and presentations covering a broad range of topics in the field.

Message from the event organisers and UFS leadership

“It is a unique honour to be able to host the national GeoCongress, being responsible for bringing together our partners in industry and academia to share our evolving understanding of the rocks, minerals, and advances in the geosciences and associated disciplines. My view of the GeoCongress stems from my appreciation and understanding of one of South Africa’s most highly regarded geologists, Dr Hans Merensky. Dr Merensky is credited with finding platinum in the Bushveld, diamonds in Namaqualand, and phosphorus and vermiculite in Phalaborwa. However, less remember was Dr Merensky’s ability to coordinate comprehensive investigations of rocks, and his tenacity in exploring across the South African landscape. For this, I believe our theme Embracing Change through Collaboration is apt, since it's through interactions between various sectors that we are best able to handle the challenges of tomorrow,” comments Dr Martin Clark, Senior Lecturer in the UFS Department of Geology and principal investigator of the Merensky Group for Airborne Geological Image Classification (MAGIC) at the Department of Geology.

“The 2025 GeoCongress symbolises the principles of sustainable research and innovation that we advocate for in the Faculty of Natural and Agricultural Sciences and underscores our dedication to the development of interdisciplinary collaboration. Research collaboration through our Green and Complex Research Hubs is consistent with the congress theme of ‘Embracing Change Through Collaboration’. By integrating geoscience research with broader sustainability and technological advancements, we guarantee that our scientific discoveries make a significant contribution to both environmental stewardship and industry," said Prof Paul Oberholster, Dean of the Faculty of Natural and Agricultural Sciences.

Outstanding line-up of attendees

GeoCongress 2025 is set to bring together some of the most influential minds in geoscience, creating a space where leading academics, industry experts, and emerging researchers can exchange ideas and insights. Attendees will have the opportunity to engage with key figures shaping the field, including Prof Glen Nwaila, Director of the Wits Mining Institute and a leading authority in economic geology and geometallurgy at the University of the Witwatersrand; Prof John Carranza, a highly regarded researcher at the UFS; and Sifiso Siwela, Chairperson of the SAMCODES Standards Committee and past president of the Geological Society of South Africa.

Adding to the wealth of expertise, Dr Geoffrey Howarth, Senior Lecturer at the University of Cape Town and Head of the Electron Microprobe Facility, will bring his knowledge in mineral studies, while Prof Susan Webb, Associate Professor of Geophysics at the University of the Witwatersrand and acting co-director of the DSI-NRF Centre of Excellence for Integrated Mineral and Energy Resource Analysis (CIMERA), will share her insights into geophysical research. Dr Hayley Cawthra, specialist scientist at the Council for Geoscience, will contribute her expertise in coastal geology, and Prof Steve McCourt, President of the Geological Society of South Africa and Professor Emeritus at the University of KwaZulu-Natal, will bring his experience in structural geology. The line-up also includes Prof Wolfgang Maier from Cardiff University, whose research on magmatic ore deposits continues to influence the field.

To make the most of your GeoCongress 2025 experience, be sure to take full advantage of the networking opportunities – from informal meet-and-greets to engaging panel discussions. Don't miss the chance to attend hands-on workshops and exciting field excursions. These excursions offer a deeper look into the country’s rich geological history, with opportunities to visit Florisbad, Kimberley, the Beatrix operations in the Goldfields, or the Drakensberg. For more tips on navigating the congress and must-see highlights, visit the GeoCongress 2025 website at https://geocongress2025.org.za/ or contact us at secretariat@geocongress2025.org.za.

GeoCongress 2025 is set to be a landmark event on the geosciences calendar. With the UFS as your host, prepare for an experience that combines academic excellence, innovation, and a collaborative spirit. Welcome to GeoCongress 2025!

News Archive

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

2016-05-09

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.

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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