Ozone Applications:

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Ozone Applications Pool, Spa and Water
Features The Clear Opportunity

• Presented for WQA by Cameron Tapp
• ClearWater Tech, LLC

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The WQA Water Treatment Specialist Has A Golden
Opportunity for Additional Income

• Municipal Pools
• Commercial Spas
• Custom Residential
• Large Water Features

Commercial Ozone is Big Business
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Why Use Ozone?

• Ozone is the strongest oxidizer commercially
  available

• Ozone requires no storage and is generated on-site

• Ozone is safe, natural and an excellent
  flocculent

• Ozone provides pre-oxidation in recreational
  environments

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Why Use Ozone? (Continued)
Results of
pre-oxidation with ozone 1- Chloramine
Elimination Oxidizing the water prior to
chemical introduction greatly reduces the chance
of combined chlorine forming. Ozone oxidizes
the contaminants that chlorine may have
difficulty oxidizing, thus preventing
chloramines from forming. Ozone oxidizes
chloramines that have already formed (however
slowly)
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Why Use Ozone? (Continued)
2 - Greatly reduced chemical consumption Using
ozone to complete the majority of oxidation
demand will reduce chemical requirements
(both the residual sanitizer and pH adjustment
chemicals)
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Why Use Ozone? (Continued)
Benefits of chloramine
elimination

• Improved bather comfort
• More effective use of residual sanitizer
• Pool area odor eliminated (natatoriums)
• Improved water quality (disinfection)

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Ozone Chemistry on Commercial Applications

• Ozone/Bromine
• Ozone/Chlorine

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Ozone Chemistry on Residential Applications

• Ozone Only
• Ozone/Bromine
• Ozone/Chlorine

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Ozone Chemistry

• Ozone/Bromine

• When to use Ozone/Bromine
• With light to medium bather loads
• With good filtration, min. 6 hr. turnover rate
• If customer is adverse to using chlorine
• If handling chemicals is an issue
• Minimal room for contact vessel(s) is available

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Ozone Chemistry

• Ozone/Bromine

• Basic premise is providing pre-oxidation to
  reduce load on residual sanitizer (chlorine),
  eliminating chloramine formation
• Ozone has no affect on chloride ion (unlike
  bromide ion, which ozone oxidizes back to HOBr)
• Ozone will oxidize free available chlorine, but
  very slowly due to complexity of the chlorine
  molecule and because ozone is acting on other
  contaminants in the water.

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Ozone Chemistry

• Ozone/Chlorine

• When to use ozone/chlorine
• High bather loads or other extreme conditions
• Older pool designs with limited filtration
• If possible, get clearance from local health
  dept. to
• operate at a 0.2 - 0.5 ppm (700-800 mV ORP)
• Alternative level of 0.5 - 1.0 ppm (700 - 800 mV
  ORP)

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Ozone Chemistry

• Additional Suggestions
• Use a flocculation program with all high rate
  sand filters (especially in bromine pools)
• Use a flocculent, particularly with sand
  filtration
• Shock all pools on a regular basis
• Drain at least 50 of a bromine pool annually
• Maintain lowest possible residual sanitizer level
  (0.2 - 1.0 ppm) _at_ 750-800 mV ORP on chlorine
  pools
• Maintain pH range of (7.2 - 7.4) for chlorine
  pools, (7.4 - 7.8) for bromine pools

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Mass Transfer

• Efficient Ozone Dissolution in Water
• Pressure, Concentration Temperature
• Air to water volume ratio
• Ozone concentration
• Bubble size
• Venturi Injection provides greater than 95 MT

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Flow Schematic

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Other Applications

• Additional suggestions
• Water parks
• Corporate water features, fountains
• Koi ponds

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Summary

• Ozone is the most powerful oxidizer available
• The result of using ozone with lower levels of
  chlorine will yield higher ORP levels and reduced
  chemical consumption
• Ozone will pre-oxidize the contaminants that form
  chloramines
• Ozone oxidizes chloramines (slowly)
• Ozone is a proactive approach to chloramine
  elimination (rather than adding chemicals after
  they have formed)
• Ozone is a more natural approach to oxidation
  (by-product is oxygen)

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