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Innovative Water Treatment Solutions: Neutralization and Desalination for Environmental Protection

This document discusses essential water treatment solutions focusing on neutralization and partial desalination to safeguard the environment and human health. It highlights the need for complete desalination to produce drinking water over the next four years, with examples from projects like Iluka Resources and Namakwa Sands. Key processes include lime handling, Fe(II) removal, and innovative technologies like the CSIR ABC Desalination and TUT MBO processes for effective water treatment. These initiatives aim to optimize costs and improve the quality of mining water for sustainable use.

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Innovative Water Treatment Solutions: Neutralization and Desalination for Environmental Protection

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  1. What treatment? Neutralization and partial desalination - essential for protection of the environment and human health and, Complete desalination - drinking water needed during the next four years

  2. Limestone handling and dosing system

  3. Full-scale neutralization plants • Iluka Resources, Hamilton • Namakwa Sands, Lutzville

  4. Fe(II)-removal with sequence batch operation

  5. Treatment at Grootvlei water (108 Ml/d) Grootvlei Mine where contains 100 mg/l iron(II) and 350 mg/l alkalinity. Currently this water is treated at a cost of R3.7 million/month, using lime and oxygen. 100mg/l need to be oxidised in a more cost-effective way.

  6. Need 400 Ml/d by 2014 in Gauteng Coal mining sector already produce 35 Ml/d drinking water from mine water in Mpumalanga Desalination

  7. CSIR ABC Desalination process(Alkali-Barium-Calcium) • Lime and/or CaS pre-treatment • Barium treatment for SO4 removal • Sludge processing

  8. Western Utilities Corporation pilot plantto evaluate ABC process

  9. TUT MBO process (magnesium-barium-oxide) • Metal removal with Mg(OH)2 • SO4 and Mg removal with Ba(OH)2 • Sludge processing

  10. Soshanguve pilot plant for freeze desalination Ice filter Heat exchangers Refrigeration unit

  11. Ice production Official launch – 25 October 2011 at 13:00 as Soshanguve Campus of TUT

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