Disinfecting the Water using Peroxone

Course Summary

This course provides guidance for disinfecting the water using Peroxone. Peroxone is one of the most potent and effective germicides used in water treatment. It is slightly more effective than ozone against bacteria, viruses, and protozoan cysts. Peroxone itself does not form halogenated DBPs; however, if bromide is present in the raw water or if chlorine is added as a secondary disinfectant, halogenated DBPs including bromate may be formed. Other byproducts include organic acids and aldehydes. Ideally, ozone should be used as a primary disinfectant prior to peroxone treatment. For disinfection, peroxone addition should be after ozonation. Ozone contact should precede addition of hydrogen peroxide. For oxidation, peroxone can be added prior to coagulation/sedimentation or filtration depending on the constituents to be oxidized.

A key issue with the use of peroxone as a disinfection process is that the process does not provide a measurable disinfectant residual. It is therefore not possible to calculate CT similar to the use of other disinfectants. While no credit can be given for hydroxyl free radicals because it cannot be measured directly, some credit may be considered for any detected ozone in peroxone systems. Peroxone does provide pathogen inactivation, as discussed in this chapter, but equivalent CT values or methods of calculating equipment CT credits have not been established at the date of publication of this guidance document.

Learning Objectives

• PEROXONE CHEMISTRY
  • Oxidation Reactions
  • Reactions with Other Water Quality Parameters
  • Comparison between Ozone and Peroxone
• GENERATION
• PRIMARY USES AND POINTS OF APPLICATION
  • Primary Uses
  • Points of Application
• PATHOGEN INACTIVATION
  • Inactivation Mechanism
  • Environmental Effects
  • Disinfection Efficacy and Pathogen Inactivation
• DISINFECTION BYPRODUCTS
• STATUS OF ANALYTICAL METHODS
  • Monitoring of Hydrogen Peroxide
• OPERATIONAL CONSIDERATIONS
  • Process Considerations
  • Space Requirements
  • Materials

Course Author

Environmental Protection Agency

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Certificate of completion of the course

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This online PDH course can also be used as a continuing education course for the following.

Environmental Engineering