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TRAMFLOC, INC. P.O. Box 350 Tempe, AZ
85280-0350 Telephone: 480-491-6895 Fax: 480-456-1664 Toll Free: 800-613-6803
Phosphorous Removal
Removal of Phosphorus
1. Precipitation
Pre-Precipitation - Chemical addition to raw wastewater and precipitate is removed with primary sludge.
Simultaneous Precipitation - Chemical addition so that the precipitation is removed with the waste biological sludge. Can be added either to primary effluent or to mixed liquor, prior to secondary sedimentation.
Post-Precipitation - Chemical addition after both primary and secondary treatment processes, where an additional solid separation device is needed (DAF, clarifier or filter).
2. Biological Removal
Also called Bio-Assimilation. Accomplished by stressing bacteria into consuming the Phosphorus. Average of 10 to 30% Phosphorus removal is dependent on BOD, Soluble Phosphorus, Dissolved Oxygen and Volatile Suspended Solids concentrations.
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