AWWA ACE93186

The buoyant coarse media flocculator was designed to provide the same level of performance as gravel-bed flocculators, plus more operational flexibility and ease of cleaning. The objectives of this research were to (1) optimize the configuration and operating criteria of the BCM flocculator using model suspensions of kaolinite clay in a controlled laboratory setting; and (2) to evaluate the long-term performance of an optimized BCM flocculator using coagulated water from two surface water treatment plants. A two-stage BCM flocculator provided effective treatment at loading rates as high as 12 gpm/sft for the two source waters tested; a single stage flocculator worked for one of the source waters at the same loading rate. Source water quality and coagulant chemistry directly influenced flocculator performance and dictate the type of flocculator configuration. Due to relatively high shearing forces within the BCM bed, the use of a polymer aid may be required as a floc conditioning agent, especially if alum is used as the primary agent.

Product Details

Published:

01/01/1993

ISBN(s):

0898677149

Number of Pages:

24

File Size:

1 file , 830 KB