The author describes a statistical model that can be
used to account for the error in estimating the required
chloramine concentration times time (C ? T) to inactivate
Cryptosporidium oocysts with ozone followed by
chloramine in drinking water. The safety factor
described in the article can be used to determine whether
the required C ? T takes account of specific known
uncertainties. The fact that lots are not all identical needs
to be accounted for when the safety level of C ? T is
calculated. Because lot variability is accounted for in the
current Long Term 2 Enhanced Surface Water Treatment
Rule, water utilities may want to use a similar
factor for a sequential inactivation approach that also
takes lot variability into account. This study shows that
a sequential application of ozone and chloramine is a
promising alternative to a single application of ozone or
chloramine to control C. parvum oocysts in drinking
water. Water utilities can calculate the required C ? T
for the secondary disinfectant in order to achieve a specified
inactivation level of C. parvum oocysts. Includes 10 references, tables, figures.
| Edition : | Vol. 100 - No. 7 |
| File Size : | 1
file
, 440 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 6 |
| Published : | 07/01/2008 |
