How do we eliminate harmful microrganisms from water?
To eliminate harmful microrganisms from water we tend to use disinfectants. Examples of disinfectants are chlorine, UV, ozone (O3) and chlorine dioxide (ClO2). There are several different advantages and disadvantages to the various disinfection techniques, as shown on our disinfection page. Chemicals that are harmful to certain types of microrganisms are often used to eliminate them. These chemicals are known as biocides, because they are mortal to microrganisms.