The performance of three full-scale cyclic activated sludge facilities, operated for biological phosphorus removal is demonstrated. The facilities are operated without formal mixed anoxic or anaerobic sequences in a variable volume mode. The system is independent of fill-ratio operation for filamentous sludge bulking control.

Fed-Batch Reactor, Cyclic Activated Sludge System, Captive Selector, Phosphorus Removal
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© IWA Publishing 1992
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