AWWA WQTC69245

Solids contact clarifiers are the flagship of softening plants in the Midwest and Florida. Although it isone of the oldest technologies in the water treatment industry, it is also one of the most misunderstoodand neglected unit processes. This work focuses on the proper operating and control of solids contactclarifiers and introduces a simple, straightforward algorithm programmed into a supervisory control and data acquisitionsystem (SCADA) for generating and maintaining the proper amount of solids in the center cone of asolids contact clarifier. Study conclusions include the following:the key to optimized solids contact clarifier operation is the generation of an inventory of largeuniform diameter solids that remain in suspension;solids contact clarifiers can be difficult to operate due to the solids removed on a daily basis ascompared to the amount of solids inventory that is maintained in the center cone; and,mass balance combined with simple algorithms and utilization of an existing SCADA systemcan create a system, which reliably manages solids and produces excellent water quality. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2008

Number of Pages:

4