The growth of microorganisms in water can cause many problems with the use or recycling of water. The most important application is the treatment of general drinking water to remove pathogens that can make people sick.

There are many ways ozone water purification can be used to control or eliminate the growth of microorganisms, including chlorine, UV, and ozone. Each technique has advantages and disadvantages. For example, UV is a great way to remove microorganisms from water that can easily transmit UV light, which is called UV transmission. However, UV only treats water that passes through the UV lamp.

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If dirt gets into the water after the lamp, for example from the air, the water is no longer protected. Chlorine and ozone, on the other hand, remain in the water and retain residues that move through the water system and control the growth of microorganisms.

In particular, the benefits of ozone are that it is a very strong biocide which is effective against a wide variety of microorganisms, kills organisms quickly, is generated on site, does not need to purchase or store ozone, forms limited disinfection by-products, and breaks down after use in Oxygen. This article describes how an ozone water purification system is designed to control or remove microorganisms from water.

Like many biocides, the effectiveness of ozone is determined by the average amount of ozone present over a given period of time. It is expressed as the product of the average ozone concentration (residual) multiplied by the time during which the organism was exposed to residual pollution. This product is called a CT and usually has units of mg-min/liter.