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UFS students claim top honours in 2025 SDG Challenge South Africa

12 November 2025 | Story Vuyelwa Nkoi | Photo Supplied

A dynamic team of students from the University of the Free State (UFS) has secured first place in the 2025 SDG Challenge South Africa – a prestigious competition that unites students and industry partners in addressing real-world issues aligned with the United Nations Sustainable Development Goals (UNSDGs). This outstanding achievement celebrates the creativity, collaboration, and strong commitment of UFS students to building a more sustainable and inclusive future.

Hosted by Soapbox South Africa, the SDG Challenge pairs student teams with industry experts to co-design practical solutions to pressing societal needs. Competing against leading institutions – including the University of Pretoria, University of Zululand, University of Johannesburg, the University of the Witwatersrand, and the University of KwaZulu-Natal – the UFS students distinguished themselves with a community-driven, scalable approach.

The winning UFS team consisted of Almaré de Bruin, Njabulo Dlamini, and Vuyelwa Nkoi from the Department of Sustainable Food Systems and Development, as well as Hanipher Mili and Gugulethu Nhlapho from the Department of Agricultural Economics – reflecting a powerful interdisciplinary collaboration.

Innovative Agrihub solution for community sustainability

Partnering with Ivanplats mine, the students developed a holistic solution to reduce food insecurity and promote environmental sustainability in resource-limited communities in Mokopane.

Their innovative project, built around a WhatsApp-based Agrihub, enables agricultural knowledge sharing, market access, and community engagement. The solution included the following:

A WhatsApp Agrihub platform for real-time agricultural support
An Implementation Manual for community rollout
A low-cost irrigation prototype designed for small-scale gardens
A scalable model for replication in other communities
A final showcase presentation demonstrating its feasibility and long-term impact

To reduce surplus produce waste and create entrepreneurial opportunities, the team also produced value-added products – including pickled beetroot and carrot preserves – in the UFS food lab.

The Agrihub doubles as a community marketplace where residents can sell both fresh produce and recyclables. A R20 subscription fee supports local facilitators and content creators, promoting sustainability and community ownership.

Their project advances multiple UNSDGs, notably Zero Hunger, Responsible Consumption and Production, Climate Action, and Decent Work and Economic Growth.

“This victory is a testament to the calibre of our students and the mentorship they receive,” says Prof JW Swanepoel from the Department of Sustainable Food Systems and Development. “Their innovative thinking and commitment to real-world impact reflect the values of the University of the Free State.”

The UFS team’s success not only underscores their potential as emerging leaders in sustainability, but it also affirms the university’s growing role in driving development and resilience across African communities.

News Archive

UFS venture cleans up acid mine drainage

2015-07-06

The system that puts oxygen back into the water.

Photo: Supplied

South Africa is one of the most important mining countries in the world, beginning in the 1870s. Although the mining industry has been responsible for significant development and employment, it pollutes the environment and waters sources. Through the joint effort of a well-known mining company, the University of the Free State, and the Technology Innovation Agency (UFS/TIA) SAENSE Group, a new treatment for Acid Mine Drainage (AMD) has been developed.

The system treats the major contaminants found in acid mining wastewater effectively.

The UFS remediation systems use a reservoir tank into which the AMD is pumped. The water then flows passively (without using energy) to the Barium Carbonate Dispersed Alkaline Substrate (BDAS) system. The metals and anions in the AMD react chemically with the barium carbonate and precipitate (form solids). The solids stay in the tank while the clean water is released.

The efficacy and applicability of the research was demonstrated on site in Belfast, Mpumalanga where the team constructed a pilot plant in July 2014. This patented technology has treated 1 814 400 litres of Acid Mine Drainage to date with an outflow water quality that satisfies the South African National Standards (SANS) 241:2006 & 2011 regulations for drinking water.

Rohan Posthumus from the (UFS/TIA) SAENSE Group said: “At this stage, we do not recommend that the water should be used as drinking water, but certainly it can lower water usage in mines while finding application in dust suppression of washing processes. The team would like to complete a full characterisation of the final released water. There are currently no toxic by-products formed, and even very basic filtration can make the outflow drinking water.”

Prof Esta van Heerden’s research group from the Department of Microbial, Biochemical, and Food Biotechnology has been working on AMD research for some time, but the development of the BDAS system was started in 2013 by post-doctoral student, Dr Julio Castillo, and his junior researcher, Rohan Posthumus.

The data from the BDAS system have led to two publications in peer-reviewed journals as well as a registered patent.

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