In 2011, Pierce County was exploring wastewater treatment options for dewatered centrate within a $350M facility known as Chambers Creek Regional Wastewater Treatment Plant. This new 170 ML/d (45 MGD) municipal wastewater treatment facility upgrade and World Water Works’ DEMON® Anammox side stream deammonification process allowed the plant to reduce the capital and infrastructure costs of the new facility. The main goal of the system was to reduce the discharge of nitrogen to Puget Sound while also reducing plant operating costs while in nitrogen removal mode. At the time, there were no full-scale operating deammonification applications in North America.

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