ABSTRACT
Ozone is primarily used for the treatment of water, wastewater, and water slurries, such as paper pulp. The ozone is transferred into the water in "ozone contactors" which act as mass transfer devices as well as reactors for the treatment. In most water and wastewater treatment applications the solubility of ozone in water under ambient conditions is approximately 4 mg/l when the ozone is generated from air and 15 mg/l when it is generated from oxygen. Amperometric analyzers utilize an electrochemical cell for the determination of ozone. In the bare-metal electrode variety of the amperometric ozone monitor, the water flows through the galvanic cell and serves as the electrolyte. The gaseous ozone which is stripped from the water is analyzed by UV monitors. The best known, most frequently used colorimetric method is the indigo trisulfonate method for the measurement of ozone dissolved in water. The indigo method is employed in the "AccuVac Ampul" ozone measurement.
