The process typical of a commercial water treatment plant involves the following steps:

1. Coagulation: Chemicals are added to water to make small particles stick together, forming larger clumps.
2. Flocculation: Gentle mixing helps the clumps formed during coagulation to grow bigger, making them easier to remove.
3. Sedimentation: The water is left still, allowing the larger clumps to settle at the bottom.
4. Filtration: The clear water on top passes through filters to remove any remaining particles.
5. Disinfection: Chemicals or UV light kill any lingering bacteria or viruses.

With UV light disinfection systems, the commercial water treatment process is as follows:

1. Water flows into the system.
2. The system uses a mechanical filter to capture large particles such as sand and silt from the water.
3. A media filter, often filled with activated carbon, traps smaller contaminants like chlorine and odours.
4. The water then passes through a UV chamber, where ultraviolet light kills bacteria and viruses.
5. Disinfected water exits the system, ready for use.