Applicable Regulations
National Sanitation Foundation
Standard #50. State of Michigan
Act 368 Part 125.
Overview of Procedure
The use of an ozonation system that
is properly sized and integrated into the swimming pool treatment system will allow ozone
to act as the primary oxidizer and disinfectant. Ozone is fed into the pool feed water
prior to the chlorine injection process. Ozone destroys many organic compounds and
microorganisms that would typically react with chlorine, resulting in a reduction of the
chlorine demand and total dissolved solids. Lower chlorine demand allows the pool operator
to achieve disinfection of the water with minimal chlorine residual, and the reduction of
total dissolved solids improves the water clarity. The reduction of chlorine usage will
minimize the amount of chlorine off-gas that causes corrosion in swimming pool
environments. Ozone will also break down chloramines, a major cause of the odor and eye
irritation associated with swimming pools.
Waste
Minimization Procedure
At the Margaret Bell Pool,
an ultraviolet bulb ozone generating system is mounted in the pool mechanical room. Ozone
generated by the system is mixed with recirculated pool water and pumped through tubing to
a 1,200 gallon surge tank. Contact time in the tank is approximately 5 - 10 minutes. The
water is sent through a filtering process, chlorinated, and returned to the pool. It is
expected that a reduction of chlorine use will be realized; however, the ozonation system
has been in place for only a short amount of time, and quantitative data detailing actual
chlorine usage has not been obtained. This section will be updated as information becomes
available.
Known
Limitations
None known.
Safety
& Health Precautions/Personal Protective Equipment
Follow all applicable
safety and health protocols and regulations as established by your institution.
Benefits
The addition of ozone to the swimming pool treatment system will provide better water
quality for the swimmers, including a reduction of the chlorine odor and eye irritation,
and improvement of the water clarity as a result of the reduction of the total dissolved
solids.
Additionally, a reduction in chlorine
usage is expected as a result of the ozonation of the swimming pool water.
Disadvantages
A disadvantage to using
ozone, especially for pool maintenance personnel with an existing respiratory condition,
would be the presence of slight amounts of ozone in the air potentially contributing to
health related problems.
Project
Related Costs
Information not available.
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