• AWWA ACE65509
Provide PDF Format

Learn More

AWWA ACE65509

  • Extended Terminal Subfluidization Wash (ETSW)- A Backwashing Technique to Improve Filter Ripening (In Cold Water Conditions)
  • Conference Proceeding by American Water Works Association, 06/01/2007
  • Publisher: AWWA

$12.00$24.00


This powerpoint presentation begins by providing background information on standard backwash (STD BW), filter ripening, and filter-to-waste. Extended Terminal Subfluidization Wash (ETSW), a technique for managing filtrate turbidity spikes immediately following backwashing(filter ripening), is presented, along with a comparison between it and STD BW. A case study is provided of using ETSW at the Lakeview Water Treatment Plant (LWTP). Results show that overall, filtrate turbidity for bothSTD BW filters andETSW filterswas low, with a standard deviation of +2%;meeting MOE turbidity requirements; and,when the ETSW filters had a larger filtrate turbidityspike, this spike was only marginally greater than that ofthe STD BW filters, which was not the case for reverse situation.

Related Products

AWWA WQTC65766

AWWA WQTC65766

Impact of MIEX Pretreatment on Downstream Conventionally Treated Water Quality Parameters..

$12.00 $24.00

AWWA WQTC57187

AWWA WQTC57187

Bromate Control During Ozonation of High-Bromide Drinking Water..

$12.00 $24.00

AWWA WQTC58965

AWWA WQTC58965

Assessment of Arsenic Treatment Alternatives for Source Waters in New Jersey, California, and Arizon..

$12.00 $24.00

AWWA ACE70521

AWWA ACE70521

Sinkzilla: Managing Media during an Interstate Disaster..

$12.00 $24.00