What exactly is the purification process?
The purification process starts with a pre-filter, screening the source water at the point of entry. In the Noah product line, the pre-filter screens are incorporated with the inlet hose. This is essential in preventing the system from becoming plugged with rocks, mud, feces and other large debris.
2. Sediment Filtration
The water passes through a sediment filter. Adding a sediment filter provides 5-micron filtration to extend the life of the carbon filter by removing unseen sediment that will prematurely clog the filter.This would include the removal of:
- Sand, Silt, and Scale
- Dirt and Mud
- Other Suspended Solids
3. Carbon Block Filtration
The carbon block filtration process is actually comprised of two distinctly different procedures.
Chemical Bonding: Uses activated carbon (sometimes called activated charcoal) which has a slight electro-positive charge added to it, making an even more attractive bonding agent to chemicals and impurities. When water is forced through the solid carbon block, it is forced to slow down and increase the amount of contact time with the carbon, allowing the carbon bonding to take place.
Mechanical Straining: The carbon is compacted into a solid brick of material. Every molecule of water is forced through the microscopic pores of carbon, effectively straining out particle matter.
4. Ultraviolet Treatment
Ultraviolet treatment is the final, and in most cases, the most important step in the purification process. After the carbon filter has cleansed the water, it is exposed to intense dosages of UV light. This exposure effectively destroys viruses, bacteria, fungi, algae and protozoa. The UV light destroys any microorganisms by scrambling its DNA structure.
As a result,the cells are rendered sterile and cannot reproduce, and thus no longer remaining a threat.
Download the full PDF to see a chart that lists the many common organisms and the UV dosages required to eliminate them (all Noah products provide 16,000 microwatts / cm2 or greater of UV exposure.)