The Ozone Swimming Pool, the latest Innovation by KMITL

The Ozone Swimming Pool, the latest Innovation by KMITL


KMITL unveils the ozone swimming pool, which is to become the “Dream Campus”, the most modern and beautiful campus in Thailand


No more chlorine.KMITL has unveiled the ozoneswimming poolto be developed and launched onto the market and leading to a reduction inthe import of technology and chlorine that will save no less than 1,400 million Baht annually.


April marks thearrival of the summer season in Thailand. During the summertime, many people look for activities to cool off. Their choices are varied and depend on lifestyle, taste and preference. One of the most popular ways of staying cool is by swimming in a poolwhich not only effectively beats the heat but also gets swimmers to exercise. However, there appear to be somedangers in chlorine which is normally used as a water treatment agent in many swimming pools in Thailand and exposure to this substance can cause skin rashes, eye problems, tooth erosion, and canner.

The health risks of exposure to chlorine have led AssociateProfessorDr.Siriwat Potivejkul, PhD and AssistantProfessorNorasage Pattanadech, PhD, from the Department of Electrical Engineering, together with engineering students atKing Mongkut's Institute of Technology Ladkrabang (KMITL), to invent the “water treatment ozonator.” Atrialgenerator has been installed at the 1,500 cubic centimetrepoolat KMITL. It is an innovation that is designed to be energy efficient by yielding a maximum ozone generating capacity of 200 g o3/hr. Ozone is produced through corona-discharge utilising a high voltage;oxygen molecules are broken down into individual oxygen atoms which are then recombined into ozone. This modelautomatically controlsthe water quality.The generator has proven to be effective and produced reliable results,it is able to be used as a prototype for commercial purposes.

Assoc. Prof. Dr. Siriwat says that the ozone generator was invented with the aim of improving the safety and living standards of the Thai people. The use of ozone is a water treatment technologythat has been employed to replace chlorine in order to reducehealth risks and it has also been used to sanitise Olympic pools. In Thailand, the risks of exposure to chlorine have been studied and it has been discovered that the use of chlorine as a water sanitiser poses various health threats. Consequently, Bangkok has taken measuresto control swimming pools in orderto make pools safe for users, requiringthe dailypH levels of swimming poolsto fallbetween7.2 – 8.4. In practice, it is difficult to maintain pH levels at 7.0 – 8.5 but failure to do socreatesodours and causes skin irritation, eye tissue damage and tooth decay. Research by the Bureau of Dental Health at the Department of Health, has shown thatathletic swimmers are 4.68 times more likely to experience tooth erosion compared with occasional swimmers and, also, that children aged between 5-6 riskdamage to their growing permanent teeth.


Benefits of the application of ozone in swimming pools

  1. Preventingred eyes and eye irritation;even high levels of ozone do not contribute to these problems.


  1. Purifying water 3,125 times faster than chlorine.


  1. Eliminating the creation of undesired byproducts such as chloramine, which produces odours and causes body irritation, and Chloro-organic compounds orTrihalomethanes (THMs) which are thought to be carcinogenic.


  1. Providing the oxidation of organic matter such as urine and phlegm and inorganic matter such as ironand manganese in the water and maintaining water quality and balance.


  1. Maintaining pH levels, in contrast to the application of chlorine which alters pH levels and necessitatestheir continuous adjustment.


  1. Greatly reducing the frequent purchase of costly chemicals becauseozone is produced from the oxygen present in the air.


  1. Less cleaning of pool filters becauseozonation does not leave any chemical and particleresidues. After ozone has ruptured the cell walls of organisms, bacteria and viruses, causing their contents to disintegrate, it then reverts to oxygen and this additional oxygen in the water makes it pleasant and healthy for swimmers.


“I believe that, in the future, chlorine will be replaced and new technologies will be adopted for the safety and the better living quality of people. It is necessary for chlorinated swimming pools, which currently number more than 1,000 in Thailand,to employ new methods of the water treatment and the use of ozone for sanitisation represents a great alternative.The cost of the manufacture and installation of ozone generators is estimated atfive billion Baht.Thailand should supporttechnology invented by Thai researchersin order to discourageforeign importswhich could save not less than one billion Baht a year and should also discourage the importation and use of chlorine which could save no less than 400 million Baht annually. In addition, this technology could be developed totreat industrial waste water, especially that from dyeing factories which number more than1,000,” says a professor from the Department of Electrical Engineering at KMITL.


For more details, please contact the Public Relations Division, King Mongkut’s Institute of Technology Ladkrabang. Tel: 02-329-8111, Email:






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