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12 August 2022 | Story NONSINDISO QWABE | Photo NONSINDISO QWABE
Mpho Twala
Cultivating the land-Mpho Twala.

The Bachelor of Community Development qualification offered on the Qwaqwa Campus develops young professionals who are able to work collaboratively with the community to come up with initiatives that build resilience and sustainability. Before obtaining their qualifications, students are required to identify community needs and to come up with viable ways to eradicate these.

It was during this period that Mpho Twala, a recent CommDev graduate, identified a once-thriving community vegetable garden that had been abandoned and subsequently stripped over the years. Further research led her to realise that the soil was still very fertile, and with a bit of work, could once again be revived to become an income-generating business. She received her qualification during the April graduations on the Qwaqwa Campus, but she did not stop there.

Bringing change to the community through vegetable farming

Twala, with no agricultural background, approached the locals for permission to revive the 1-ha garden into a community-owned vegetable garden. “The land has been uncultivated for more than a decade, and after conducting a needs analysis, I didn’t want to leave it like that, because I saw that if I worked with young people, this would help with the high unemployment rate among the youth in this area,” Twala said.

She says she was driven by bringing about change in her community, which she believes was inspired by her studies.
“I’ve always wanted to do something in my community, and CommDev taught me to see opportunities instead of challenges.”

The vegetable garden currently has 17 employees, 10 of whom are under the age of 35. They are currently harvesting cabbages, various forms of spinach, and white onion – all organic – for home consumption and community purchasing. They also occasionally sell to hawkers around Qwaqwa.

Twala dreams of expanding the garden, adding more crops, and ultimately reaching commercial level. “We are currently classified under subsistence farming – farming for home consumption and selling the surplus so that the project can remain operational. But with the right funding and support, we can grow bigger and better.”

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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