Municipal Water/Wastewater Blog

Municipal Water and Wastewater

Russell C. Wright, MS, PE

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Thirty Years of Spiral Rakes in Clarifiers – What Have We Learned?

Posted by Russell C. Wright, MS, PE on May 22, 2019 3:07:49 PM

The year 2019 marks thirty years since WesTech’s first installation of spiral blade clarifiers at the 23rd Avenue Treatment Plant for the city of Phoenix, Arizona. The then-new clarifier design included many innovations, including (but not limited to) deep, continuous spiral rake blades, an energy dissipating inlet (EDI), and a Stamford baffle below the effluent weir. It was christened the COP™, which stood for Clarifier Optimization Package.

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Category: Water Treatment

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