Ozone Works in Hot Water

Posted by Scott Postma on January 25, 2012 under Food Industry, ozonated water, Water Remediation | Be the First to Comment

There have been a lot of question about the efficacy of ozone in warm/hot water. Yes – ozone does work in hot water! See the supporting documentation below.

: Ozone Efficacy in Hot Water – PDF

EPA Chart showing log 4 virus inactivation with ozone vs. temperature

R.N. Kinman (1975) & E. Katzenelson, et al. (1974) reported “As temperature increases, ozone becomes less soluble and less stable in water; however, the disinfection and chemical oxidation rates remain relatively stable. Studies have shown that although increasing the temperature from 0 to 30 deg C can significantly reduce the solubility of ozone and increases its decomposition rate, temperature has virtually no effect on the disinfection rate of bacteria.”

In other words, the disinfection rate was found to be relatively independent of temperature despite the reduction in solubility and reduced stability at higher temperatures.

If hot water reduces the solubility of ozone, how is Ozone Solutions addressing the lower solubility issue?

Generating high ozone gas concentrations provides better ozone mass transfer into water. We generate these high concentrations by:

using an oxygen concentrator to provide a 90% pure oxygen feed gas to the corona cell thereby increasing the generated ozone concentration
using a high-frequency ozone generator which can generate ozone concentrations in excess of 7% by weight

Contact Ozone Solutions at 712-439-6880 for more information.