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Disinfection refers to the process of using agents that could inhibit microorganism growth in a system. In water treatment, one of the most common methods of disinfection is chlorination. However, other methods like ozonation and ultraviolet disinfection are in use, too.

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Reverse osmosis should generally be able to remove extracellular microcystin and cylindrospermopsin. However, it is recommended to conduct site specific tests since removal efficiency depends on the membrane and the raw water source and quality. 

The typical contact time in a UV unit is 30 minutes. After this, UV light should have already deactivated the bacteria efficiently.