Provide PDF Format
AWWA ACE99567
- Control of Cryptosporidium Oocysts by Steady-State Conventional Treatment
- Conference Proceeding by American Water Works Association, 01/01/1999
- Publisher: AWWA
$12.00$24.00
Pilot-scale experiments have been performed to assess the ability of conventional treatment to control Cryptosporidium oocysts under steady-state conditions. The work was performed with a pilot plant that was designed to minimize flow rates and the number of oocysts required for continuous spiking. Viable oocysts were fed into the plant influent at a concentration of 106/L for 36 to 60 hours. The removals of oocysts and the surrogate parameters turbidity, total particle counts, and aerobic endospores were measured through sedimentation and filtration. There was a positive correlation between the log removals of oocysts and all surrogate parameters through the coagulation and settling process. With proper coagulation control, the conventional treatment process achieved the 2 log total Cryptosporidium removal credit granted by the Interim Enhanced Surface Water Treatment Rule (IESWTR). In all cases where 2 log total removal was not achieved, the plant also did not comply with the IESWTR's filter effluent turbidity requirements.
Related Products
