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05 April 2021 | Story Dr Nitha Ramnath | Photo Supplied
Jamba Isaac Ulengo.
Jamba Isaac Ulengo, our guest in the third episode of the Voices of the Free State podcast series is a South African rugby union player who proudly joined his team in bringing home a gold medal at the 2013 World Games. 

François van Schalkwyk and Keenan Carelse, UFS alumni leading the university’s United Kingdom Alumni Chapter, have put their voices together to produce and direct the podcast series.  Intended to reconnect alumni with the university and their university experience, the podcasts will be featured on the first Monday of every month, ending in November 2021.  Our featured alumni share and reflect on their experiences at the UFS, how it has shaped their lives, and relate why their ongoing association with the UFS is still relevant and important. The podcasts are authentic conversations – they provide an opportunity for the university to understand and learn about the experiences of its alumni and to celebrate the diversity and touchpoints that unite them. 

Our podcast guest

Born in the North West town of Vryburg, Ulengo first played provincial rugby at the U16 Grant Khomo Week in 2005. While attending Jim Fouché High School in Bloemfontein, Ulengo was chosen to represent the Free State at various youth levels. As an up-and-coming player, Ulengo made his break via the FNB Varsity Cup Competition where he starred for the Shimlas, scoring 11 tries in 18 appearances over the three seasons between 2010 and 2012. A short stint with the Free State Vodacom Cup side saw him make his debut for the Blitzboks (Glasgow 2012), followed by a tournament at the London Sevens in 2014. Ulengo has been a prominent member of the South African Sevens since making his debut for the team in the Scotland leg of the 2011-2012 IRB Sevens World Series. He played in the two final tournaments of that season and then signed a two-year contract with the South African Rugby Union to represent the team in the 2012-2013 and 2013-2014 series. While he only competed at four events in his first full season, he was involved in seven of the tournaments in his second season. 

Ulengo made his return to the sport by signing a contract to play Currie Cup rugby for the Pretoria-based Blue Bulls in 2014 and for their Super Rugby franchise, the Bulls, from the 2015 Super Rugby season. 

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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