This powerpoint presentation begins by providing a brief overview of N-Nitrosodimethylamine (NDMA) and then presents the study objective: address how various water quality
and operational parameters impact
NDMA formation. The experimental approach included bench and pilot-scale studies, and evaluated the following parameters: bromide, nitrite, polymer dose, biofiltration, free-chlorine contact time, chloramine contact time, re-chlorination in the distribution system, and temperature. NDMA formation tests are presented, along with results on the impacts of: nitrite; biofiltration; free-chlorine contact time; chloramine contact time; and, re-chlorination and storage time. Study conclusions indicate that: impacted by bromide (bromamines); not impacted by low levels of nitrite; impacted by free Cl<sub>2</sub> contact time; forms slowly in distribution system;
impacted by temperature; and, impacted by use of certain polyamine
polymers that
can be minimized by controlling dose of
polymer, presence of free chlorine. Includes 21 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.6 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 39 |
| Published : | 11/01/2009 |
