Anoxic Selector Technology for Control of Filamentous Bulking for Paper Mill Wastewater, 1992 Environmental Conference Proceedings
By utilizing pilot scale reactors, the applicability of anoxic selector was demonstrated for control of filamentous bulking at two facilities. One application was for a complete mix and the other for a plug flow activated sludge system, both of which were required to remove BOD and ammonium nitrogen.
Anoxic selector was shown to be effective in controlling filamentous organisms, including type 021N and S. natans.
Proper design criteria were identified for successful control which included the initial F/M ratio at the selector, volumetric loading rate, and sludge age.