Tour Stop 7: Ultraviolet light disinfection
Now the water is very clean. But as a further safety backup, the water is disinfected using ultraviolet (UV) lights.
There are six UV trains, each consisting of a pair of UV vessels. Each vessel holds 40 high-intensity UV lamp bulbs, similar to extremely concentrated sunlight. This technique is often used to sterilize medicines, food and fruit juices. Hospitals and dental offices use it to sterilize instruments.