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for algae control and arresting biological growth.
* Aeration along with pre-chlorination for removal of dissolved iron when present with relatively small amounts of manganese.
* Disinfection for killing bacteria, viruses and other pathogens, using chlorine, ozone and ultra-violet light.

Physical

Physical techniques of water/waste water treatment rely on physical phenomena to complete the removal process, rather than biological or chemical changes.

Most common physical techniques

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