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AGW-4015/4025/4045 Skid-Mounted Ozone Sanitation Systems
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SECTION 7
Ozone Overview & Safety Procedures
7A. Ozone Use and Technology Overview
7A-1. Relative Strength of Ozone
The following compares the strengths (electron
oxidation potential) of several common oxidizing
re agents:
Oxidizing Reagent EOP vs. Cl
2
Elemental Fluorine ............................2.25
Hydroxyl Radical ................................2.05
Ozone ...............................................1.52
Hydrogen Peroxide ...........................1.30
Hypochlorite .....................................1.10
Chlorine ............................................1.00
Chlorine Dioxide ...............................0.93
Bromine ............................................0.57
The following compares the CT values for water of
ozone versus forms of chlorine:
7A-2. Materials Selection
7A-3. Micro-Flocculation and Oxidation
Ozone oxidizes the following metals (know as mi-
cro-fl occulation), enabling their removal via fi ltration:
• Iron
• Copper
• Manganese
• Zinc
• Arsenic
Ozone neutralizes "nuisance" compounds - most
commonly, hydrogen sulfi de.
7A-4. Factors Affecting Sanitation
The following factors will affect the ability of ozone
to effectively act as a sanitizer:
• Type and level of contaminant
• Physical/chemical parameters of the environs
• Exposure time
• Temperature
• Concentration
• Water chemistry and pH
• Cleanliness
• Microbial attachment
7B. General Safety Information
7B-1. Ozone Properties
• Colorless to blue gas (greater than -169°F)
• Characteristic odor often associated with electrical
sparks or lightning in concentrations of less than
2 ppm
• Severe irritant above 1-2 ppm
• Generally exists as a gas
• Highly chemically reactive
• Non-fl ammable, non-carcinogenic
• Hazardous polymerization can occur
• Spontaneously decomposes to oxygen gas
7B-2. Ozone Uses
• Air and water disinfection
• Surface sanitation
• Water treatment plants
• Bottled water, irrigation, community water supplies,
swim ming pools/spas, etc.
• Aquariums/life support
• Agricultural wash water
• Wastewater treatment
• Mold and bacteria control in cold storage