Accession Number : ADP000795

Title :   The Hydrodynamic Evaluation of a Fixed Media Biological Process,


Personal Author(s) : Choi,Euiso ; Burkhead,Carl E.

Report Date : 1982

Pagination or Media Count : 24

Abstract : TWo basic classifications of flow models for biological processes are presently accepted, plug or piston flow and complete mixing. The trickling filter can be modelled as a plug flow system and the activated sludge process can be designed as a complete mixed system. If a trickling filter and a complete mixed activated sludge system are combined together in a tank, then an interesting question arises on how the mixing characteristics will be changed. A hydrodynamic evaluation was made to characterize the flow patterns and the mean detention time changes inherent to such a system. Tracer analyses were used during the course of the development of a fixed media process which utilized plastic tower packing, but unlike a trickling filter system, the packing was completely submerged. A surface aerator supplied oxygen to the system and provided mixing in the system by pumping action through a draft tube.

Descriptors :   *Waste water, *Water treatment, *Waste treatment, Filters, Pilot plants, Media, Kinetics, Mathematical models, Hydrodynamics, Facilities

Distribution Statement : APPROVED FOR PUBLIC RELEASE