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New Logic Vibratory Shear Enhanced Process (VSEP) is being used to minimise brine at the Cache Creek Casino Resort in the Capay Valley, California.

Owned and operated by the Yocha Dehe Wintun Nation, the tribe regards the land as a top priority in all aspects of its resort operations.

This approach applies to the on-site water treatment facility.

A new 18-hole golf course has further increased the resort’s water needs, but with groundwater high in salts, silica and hardness, a new treatment solution was necessary.

The tribe enlisted Hydroscience Engineers to design and engineer a system to treat the groundwater while minimising waste.

While desalination was relatively easy to come by, brine management proved to be more challenging.

Aquadyne Associates, Hydroscience’s partner, recommended the New Logic VSEP solution.

Pilot studies were carried out to verify the feasibility of the application and the data proved that VSEP would achieve the necessary volume reduction while maintaining permeate quality suitable for reuse.

The Cache Creek 650,000-gallon-per-day desalination plant is now fully operational and consists of a hollow fibre pre-filtration system to remove suspended solids, an electrodialysis reversal system (EDR) to remove salts and hardness and a VSEP vibrating membrane system to reduce the EDR brine volume.

The VSEP system is able to recover 90 per cent of the EDR brine as clean water for reuse, thus increasing overall recovery and reducing brine-hauling costs.

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