The Greater Cincinnati Water Works (GCWW) is evaluating innovative technologies for
use in meeting the long-term requirements of microbial inactivation/removal in drinking
water. The three phases of this long-term evaluation entail: scenario assessments for
long-term disinfection needs; bench-scale investigation of ultraviolet (UV) inactivation including
disinfection byproducts, and assimilable organic carbon formations; and, pilot/demo-scale evaluation to address site-specific
feasibility including hydraulic limitations. Scenario assessments indicated that GCWW
would be able to meet Bin 1 or 2 of the upcoming LT2ESWTR with the existing
conventional filtration and GAC filtration. The GCWW will need to add inactivation
technologies (i.e. UV, UF, etc) only if the source water Cryptosporidium concentration
falls into Bin 3 or higher. Bench-scale investigation of granular activated carbon (GAC) filtered water indicated that
UV effectively inactivated all the organisms studied; however, no synergism was
demonstrated when free chlorine addition following UV exposure was evaluated. Neither
low pressure nor medium pressure UV light effected the concentrations of trihalomethanes, Haloacetic Acids,
carboxylic acids, aldehydes, or total organic halogens (TOX). Additionally, there was no clear trend in AOC
concentrations with respect to the quantity of UV energy applied to the water sample. The
third phase of the evaluation is currently underway. Includes 8 references, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 430 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 14 |
| Published : | 11/01/2002 |
