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RWTS was awarded the contract to build an arsenic and cyanide wastewater treatment system for Gold Ridge Mining Ltd’s St Barbara site in the Solomon Islands.

The site was a tailing storage facility used in a gold production process. The facility was contaminated with levels of cyanide arsenic and other heavy metals.

RWTS build a treatment system in Australia before shipping it to the Solomon Islands for installation. The system included a lime dosing system for pH control, a ferric chlorite injection system to bind particles and a Chlorine dioxide generator for oxidisation and cyanide destruction.

A part of the contract RWTS facilitated the rectification of the storage facility to include rebuilding access and roads, rebuild a chemical storage facility and installation and commissioning of a water treatment system.

RWTS successfully completed the project and the system is currently in full operation.