Portable pump filters are commercially available with ceramic filters that filter 5,000 to 50,000 litres per cartridge, removing pathogens down to the 0.2–0.3 micrometer (µm) range. Some also utilize activated charcoal filtering. Most filters of this kind remove most bacteria and protozoa, such as Cryptosporidium and Giardia lamblia, but not viruses except for the very largest of 0.3 µm and larger diameters, so disinfection by chemicals or ultraviolet light is still required after filtration. Ultraviolet is a safe, clean, easy-to-maintain method of assuring that water is free of bacteria. It is a proven technology that has no significant drawbacks. It is environmentally friendly and essentially trouble-free.
With UV technology it is possible to destroy more than 99.99 % of all pathogens within seconds, without the addition of chemicals, without harmful side effects, with high efficiency and absolute reliability.
Ultraviolet is a safe, clean, easy-to-maintain method of assuring that water is free of bacteria. It is a proven technology that has no significant drawbacks. In some applications, its initial cost is a bit more than chlorination, but because of its low operating cost, it quickly pays for itself. It is environmentally friendly and essentially trouble-free.
Most ultraviolet water treatment systems require only an annual change of lamp—as simple as changing a light bulb—and a periodic change of filter cartridges if the unit has accompanying filters.
UV is a clean, natural technology that produces no wastewater and adds absolutely no undesirable by-products to the water you drink and bathe in. It’s simple—as straightforward as sunlight—and relatively inexpensive to purchase and operate. And, most important, it’s very effective.
