Cloth media filters assist city in meeting its reuse goals

Cloth media filters assist city in meeting its reuse goals
Cloth media filters assist city in meeting its reuse goals

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Problem: The Orange County South Water Reclamation Facility (North Plant) in Orlando, Florida, uses reclaimed water to irrigate citrus groves and golf courses, recharge wetlands for endangered species and the freshwater aquifer, and provide cooling water to the Orlando Utility Commission’s Stanton Energy Center. The facility began operation in 1957 with a 1 mgd trickling filter treatment system, and needed to upgrade to accommodate the community’s growth and increasingly stringent effluent requirements.

Solution: In October 2003, three of the plant’s existing traveling bridge sand filters were retrofitted using eight 12-disc-package AquaDisk cloth media filters from Aqua-Aerobic Systems, which provided a 60 percent increase in average hydraulic capacity on the basis of flow per square foot of filtration area. The cloth media filters provide the plant additional loading capacity with a smaller footprint. The pile cloth filter media allows higher hydraulic and solids loading rates than conventional media, resulting in up to 75 percent less land requirement.

Result: The eight filters are designed to treat 29.75 mgd (avg) and 59.56 mgd (peak). They will accommodate future design capacity expansion from the current 30.5 to 43.0 mgd. They also reduce TSS to required reuse quality levels of 5 mg/L and prefilter the effluent before it goes through chlorine treatment in order to provide 100 percent reuse of the plant’s effluent. 815/654-2501;


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