Multotec Builds High Recovery Water Treatment Plant In Oman

Multotec Builds High Recovery Water Treatment Plant In Oman

Based on the Continuous Ionic Filtration (CIF®) process from Multotec’s Australian technology partner CleanTeq Water, DeSALx® uses two stages of CIF® to desalinate brackish water and enables this effluent treatment process to operate at a much higher water recovery than conventionally possible

After extensive test work and design, mineral processing specialist Multotec Group is commissioning a full‑scale DeSALx® plant to treat waste water from a flue gas desulphurisation scrubber, at a minerals processing plant in Oman.

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The water treatment plant, which produces 10 cubic metrer  per hour of potable quality water for re-use within the antimony recovery plant, also includes a Multotec filter press to dewater solid waste

According to Carien Spagnuolo, senior process engineer at Multotec Process Equipment, the leading edge DeSALx® technology is being combined with more traditional technologies, to achieve water recoveries exceeding 90%.

“The pyro-metallurgical antimony plant in which we are installing at this facility, is located in a very water-constrained area, requiring a high level of water recovery and permitting no liquid effluent from the site,” says Spagnuolo.

“The antimony roaster produces waste water with high levels of heavy metals including antimony and arsenic, which need to be precipitated in a pre-treatment phase.”

Based on the Continuous Ionic Filtration (CIF®) process from Multotec’s Australian technology partner CleanTeq Water, DeSALx® uses two stages of CIF® to desalinate brackish water and enables this effluent treatment process to operate at a much higher water recovery than conventionally possible.

“This is achieved when the system is used in conjunction with an upfront precipitation step,” she says. “This essentially creates a closed loop with no liquid waste production, as the waste from the DeSALx® can be routed to the precipitation step.”

The CIF® system consists of a series of columns - each designed for a specific function: ion exchange and filtration; resin washing; and resin regeneration.

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