Background The Kuna North WWTP has been designed for a local residential developer. The plant was designed with significant flexibility due to varying loads at start-up and variable effluent requirements. Both biological and chemical phosphorus removal are employed to meet the stringent phosphorus limit and a post-anoxic zone is utilized when the total nitrogen (TN < 5 mg/L) increases. The post-anoxic zone also provides as equalization for

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