Other Forms of Microbiological Control

Apart from ready-to-use biocide formulations, there are also other chemicals that exhibit a degree of microbiological control, such as certain corrosion inhibitors that have a biostatic or biocidal action, for example, chromate. 

Also there are ion-generators using silver or copper electrodes to produce sanitizing ions in the water, although these products tend to be used only in swimming pools or the smallest cooling systems. 

There are also nonchemical processes such as UV systems, which have proved to be of interest and are further described in the following section. 

Similar to the limited popularity of magnetic devices, which do not need carefully planned and executed chemical treatment programs, there is some degree of market demand for UV systems. Periodically there is an increase in the apparent popularity of these products before the groundswell dies down to a base level. UV systems are effective sterilizers for high-quality water systems, such as may be found in electronic chip washing or pharmaceutical use. They are commonly used as sterilizers for RO-treated water. 

These systems have been promoted as complete water management packages, which do not require expensive biocidal dosing and address concerns of health and safety (especially the potential proliferation of Legionella sp.) in the built environment. Some models incorporate facilities for proportional 

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