Disinfection in Communal Bathtubs Ronald George

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1 Disinfection in Communal Bathtubs Ronald George Ron has over 17 years experience in the Aquatics Industry. He has worked closely with national and state health organizations in developing or improving water quality standards for aquatics. He is a member of the Technical Committee for NSF/ANSI 50 and 420, the International Ultraviolet Association Strategic Committee on UV in Aquatics, is a member of IAAPA, WWA and the AOAP. He has presented at World Aquatic Health Conferences, NRPA, TPPC, WWA, AOAP, Environmental Health Conferences and several State Recreational Conferences. He has published articles on RWI s and water quality improvement issues. He has been involved in several studies on validation of disinfection and filtration for both NPSF and the MAHC during its development. Ron joined ETS in December 2004 to develop the UV program in North America. He has been involved in all phases of sales, marketing, design engineering, manufacturing, installation and operation of UV disinfection systems. Ron has served as National Sales Manager, Operations Manager, and Aquatics Division Manager for ETS. He joined Neptune Benson in August 2012 and is presently the VP- Business Development- Aquatics for Neptune Benson in Beaver Dam, WI. He has a BS in Electrical Engineering. Abstract There are so many discussions taking place in our industry in regard to how we can protect our patrons. The presentation will detail what options we have in providing disinfection. It will present an overview of the various options offered, as well as, an update on how the MAHC and the latest NSF/ANSI 50 standard provide scientific data and recommendations to assist in your decision making. The session will compare and evaluate the pros and cons of various approaches to providing necessary disinfection. It will address new technology that studies have proven can be effective. It will also address what we may have to do in order to train our operators to run our plant systems more effectively.

2 Historical Perspective The advent of the public pool The Roman Baths The first public swimming pool.brookline MA in 1887 The first chlorinated pool Brown University in 1910 Used Hypochlorite to 2 liters of pool a concentration of 1ppm (70,000 gallon pool The US Public Health Service first ordinance governing construction, sterilization and use in 1961! The Solution for Years! Myth-More is Better DBPs form with the presence of Chlorine or Bromine Lower Level= Lower Amount of DBPs Pathogens like Giardia, Legionella and Crytpo cannot be inactivated with chlorine/bromine levels acceptable with patrons in the pool Less Chemicals Better Water Quality???

3 Where Are We Today? 50 States- 50 Codes Decades Old Some regulated by the state Department of Agriculture and Public Health A few with no State Code Some still do not require Chemical Feeders/Controllers Why Are We Where We Are Today? Change is burdensome for states Change is costly for states We don t have any Issues We have the best water in the State Waterborne Diseases Could Cost Over $500 Million Annually In U.S. "These cost data highlight that water-related diseases pose not only a physical burden to the thousands of people sickened by them each year, but also a substantial burden in health care costs, including direct government payments through Medicare and Medicaid," says Michael Beach of the Centers for Disease Control and Prevention, an author of the study. (2014)

4 Addressing the Disinfection Problem Ultraviolet Light LP MP Ozone AOP (Advanced Oxidation Processing) NSF/ANSI 50 and the MAHC Work being done to Harmonize A challenge because it governs Residential & Commercial Addresses Secondary and Supplemental Disinfection UV Ozone Secondary Disinfection? Disinfection systems installed in addition to standard systems like chlorine or bromine which are required to be used on high risk venues. Spray Parks, Therapy Pools, Wading Pools Others used by children 5yrs or younger Must be Validated to a minimum 3-log reduction (99.9%) Must be labeled as Secondary Disinfection Systems Under NSF/ANSI 50 validated for crypto inactivation MAHC does recommend on all venues

5 Supplemental Disinfection? Disinfection systems installed in addition to standard systems like chlorine or bromine but are not required for health and safety reasons They may be used to improve overall system performance and enhance water quality Must be clearly labeled Supplemental Water Treatment System, does not meet the requirements of Secondary Disinfection Under NSF/ANSI 50 Not validated for crypto inactivation Low Pressure UV Systems To date all used are Supplemental Treatment Systems Use driven by low capital costs Low volume/low bather load venues Purdue Study showed ineffective against Tri-Chloramines Corrosion rate higher- Tri Chloramines remained Purdue Study Corrosion Coupons of Various Metals Staged at Pool Area Significant Increase in Corrosion rate with LP System operating versus MP System Total Chloramines still Reduced with LP UV Conclusion Tri-Chloramines were still present but equipment today is not available poolside for operators to measure them Confirmation Mono Chloramines DO NOT form Di Chloramines or Tri Chloramines

6 Purdue Study The MAHC does not address Chloramines The Study spawned a grant from the CDC Develop a economical test kit We are in compliance but not addressing the health risk MP Systems Several Manufacturers Offering Validated Systems to meet the Secondary Disinfection Requirement Not All Must provide certification Provide readout of Dose, Intensity Output and Alarms Required per NSF/ANSI Edition All UV Systems Sizing is Critical Power Control is Critical All are Modeled for a Maximum Flow Range

7 Results if Not Properly Sized Waste of Energy Waste of Money Waste of Chemicals Ozone Unlike UV provides a residual in the water Unlike UV creates a chemical reaction Cannot Overdose with UV Requires more critical control because too much is dangerous AOP Defining Characteristic production of hydroxyl free radicals, the most powerful oxidizer available to disinfect water safely Several Types Ozone/UV Combination UV/Hydrogen Peroxide UV/ Electrode Based

8 AOP Several have emerged on the market with Small UV lamps No NSF listing to date NSF 50 developing testing protocol Has been used for several years in municipal waste market and other industrial markets All use MP UV lamps because the spectral energy produced creates more destructive hydroxyl free radicals Use has shown a significant reduction in the need for chemicals! Questions? Thank You for Your Attentiveness Ron George rgeorge@neptunebenson.com

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