The objectives of this powerpoint presentation include:
improve granular media filtration using engineered
ceramic media; evaluate operational robustness and dependency on
chemical coagulation; establish baseline from which to continue further
mechanistic studies; and,
evaluate microspheres as surrogates for
Cryptosporidium. A brief overview of granular media filtration is provided, along with the experimental approach that included: initial microsphere tests; uncoagulated tests on lake water;
semi- and fully coagulated tests on lake water; and, a
recovery study. Preliminary conclusions found that:
compared to a conventional configuration,
ceramic media can offer
up to 1.25 log improvement in Cryptosporidium removal, and up to 1.5 log improvement in oocyst-sized microsphere removal;
throughout the trials, particle counts and
turbidity measurements were lower in effluents
from engineered media;
correlation between microsphere and
Cryptosporidium counts must still be
evaluated, but has potential for experiments
under these conditions; engineered media may offer turbidity and particle
reduction advantage with less chemical dependency
relative to conventional filtration, long-term
performance must still be evaluated; and,
coarse engineered media filtration head loss profiles
are similar to those of conventional media but
preliminary tests suggest that the ceramic media's
greater surface roughness allows it to retain more
solids than the conventional media. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 2.9 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 31 |
| Published : | 11/01/2007 |
