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Proxa breakthrough at Exxaro

Proxa Zero waste mine water treatment facility

Belfast, Mpumalanga June 2017

PROXA is proud to announce the successful commissioning and performance testing of the mine water treatment plant at Exxaro’s North Block Complex Glisa Mine, situated close to Belfast in Mpumalanga. Operational since February 2017, the plant is a prime example of PROXA’s commitment to extracting value from mine surface water.

Project manager from Exxaro, Tertius Kruger, explains more: “Exxaro required a sustainable zero liquid discharge solution to manage the surface mine water volumes and salt balance after mine closure for ongoing protection of the environment at our Exxaro’s Glisa Mine site. What’s more, the recovered water needed to meet potable standards for supply to the local community or to river discharge standards.” PROXA’s solution was to use non-thermal zero liquid discharge technology that the company developed and commercialised in 2012. Elie Sakhat, PROXA CEO, expands: “Known as the CASCADE process, PROXA is able to use this innovative technology to recover multivalent by-product salts and potable product water for reuse. In the case of Glisa Mine, the combined efforts of Exxaro and PROXA resulted in a treatment plant reaching zero waste production”.

The CASCADE process utilises a number of key innovations by PROXA, more notably an advanced chemical reactor and proprietary point-to-point process control systems to enable reliable and robust system performance in challenging mine water applications. The CASCADE has been applied successfully for other mining majors such as Anglo American and Glencore, and the experience at Exxaro’s Glisa Mine confirms the robust and reliable nature of the technology.

Sakhat continues, “This new approach offers a number of benefits to the client, including optimum capital and operating costs. Most importantly, the ability of PROXA’s portfolio of technologies such as CASCADE, PRAEMIUM and GLACIER now removes the long-term legacy of brine ponds traditionally associated with mine water treatment.

Kruger confirms that, “The product delivered at Glisa is of a very high and professional standard. Start-up of the plant was smooth and reached maximum capacity within a period of only 4 weeks from completion.” In addition to the design, construction and commissioning, PROXA’s responsibility at the colliery includes the full operations, maintenance and technical support – providing a fully outsourced solution to the client.

Worldwide analysts, Frost and Sullivan, recently named PROXA the global winner of the 2017 Frost & Sullivan Award for Visionary Innovation Leadership for the work done to become one of the first companies in the world to commercialise eutectic freeze crystallisation technology for industrial use.

PROXA has international offices in Belgium, Luxembourg, Adelaide, Abu Dhabi, Sharjah, Johannesburg and Cape Town and employs close to 400 permanent members of staff. PROXA’s in-house research and development capabilities and 28-year track record throughout the water cycle contributes to enhancing our client’s businesses with objective advice, state-of-the-art tailored and sustainable solutions as well as lifecycle cost optimisation. In other words, solutions that are better for the client, better for the planet and its people.


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