Granular media filtration is a critical process for removing pathogens during drinking water
treatment. Removal of the protozoan pathogens Cryptosporidium parvum and Giardia lamblia
by granular media filtration has been of paramount interest due to the limitations of disinfection
processes other than UV irradiation and ozone. Most studies that have examined the removal of
these and other pathogens by filtration have been conducted during optimized filtration and pre-
treatment conditions. The present work summarizes studies that have investigated protozoan
pathogen removal by filtration during various points in the filter cycle and during non-optimal
operating conditions. C. parvum removal by granular media filtration can vary tremendously
during different periods of the filter cycle andsub-optimal performance events that can occur
during typical water treatment conditions. These differences can be site- and source-water
specific, making it difficult to extrapolate data from one study to another. A particularly
important finding is that, in some cases, poor C. parvum removal is observed when otherwise
excellent filtered water quality of <0.1 NTU is achieved. Includes 27 references, figure.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 300 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 10 |
| Published : | 06/16/2002 |
