This project is part of a proactive program undertaken by Tacoma Water to prepare for
changes in water quality expected when the Corps of Engineers completes the construction
of its new diversion structure. When the new diversion structure is available the Corps
anticipates taking water from an appropriate depth nearer the surface where the fish are
more prevalent during certain times of the year. Water is currently withdrawn from the
hypolimnion and algae or algal byproducts are not typically found. Although it is difficult
to quantify the changes in water quality that might occur, the changes can be inferred from a
period when the Corps of Engineers increased the level of the water in Eagle Gorge to
evaluate the integrity of the
existing Dam. During this time
the total organic carbon (TOC)
concentration surface waters
increased from 1.5 to 3.0 mg/L.
Algae counts increased from 2000
per mL to 5000 per mL. In
addition, the water was found to
have an earthy or a musty
smell.
This study was developed to
support the design of ozone
treatment facilities for taste and
odor control. The objectives of
this research were to:
determine the rate of oxidation and by extension, the amount of time needed for
oxidation of geosmin and MIB, two of the most common taste and odor causing
compounds;
determine the benefits of pH adjustment before ozonation; and,
better understand the relationships and synergies between ozone dose, pH, and
hydrogen peroxide dose.
Includes 5 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 440 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 14 |
| Published : | 06/17/2004 |
