This powerpoint presentation begins by providing a brief overview of the city of Hutchinson, Minnesota, and the water treatment plant (WTP) site location. Key issues included the following:
exceeding copper corrosion standards as defined in the
Lead & Copper Rule (LCR) in distribution system;
chlorine demands were significantly different between the
two treatment trains using the same water supply;
high iron concentration;
biological growth occurring within distribution systems;
disinfection byproduct (DBP) formation; and,
aging facilities. Key issues were resolved with the following results:
copper corrosion standards achieved;
2007 CCR: 0.62 mg/L;
uncontrollable chlorine demands;
previously chlorine application varied with water production,
now chlorine application H chlorine residual desired,
ammonia reduced to 0.02 mg/L, and
chlorine feed controllable; and,
high iron concentration,
Raw Water Iron concentration of 2.6 mg/L,
existing plan generally controlled Iron below 0.30 mg/L, and
finished water Iron = 0.01 mg/L. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 2.4 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 20 |
| Published : | 11/01/2008 |
