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Ultraviolet (UV) Disinfection

Information on related products can be found on the following pages:
Ultraviolet Disinfection Systems
Under Counter UV Systems

The Need

It is proven scientifically that 85% of child sickness and 65% of adult diseases are produced by water-borne viruses, bacteria and intestinal protozoa such as Cryptosporidium and Giardia. Inappropriate water treatment can lead to heath problems - hepatitis B, tuberculosis, meningitis, typhoid fever, tricomoniasis, and cholera, glaucoma, gastrointestinal pain, salmonella, poliovirus, and diarrhea. In North America, E.coli O157:H7, an extremely dangerous strain of E.coli bacteria, infects more than 80,000 people annually. Fortunately, E.coli O157:H7 is easily inactivated by UV light.

Disinfecting your drinking water with ultraviolet light (UV) makes good sense. It's environmentally safe, it's well proven, and it's the way of the future for water disinfection requirements around the globe.

The Process

Ultraviolet (UV) disinfection uses a UV light source, which is enclosed in a transparent protective sleeve. It is mounted so that water can pass through a flow chamber, and UV rays are admitted and absorbed into the stream. When ultraviolet energy is absorbed by the reproductive mechanisms of bacteria and viruses, the genetic material (DNA/RNA) is rearranged and they can no longer reproduce. They are therefore considered dead and the risk of disease has been eliminated.

UV-rays are energy-rich electromagnetic rays that are found in the natural spectrum of the sunlight. They are in the range of the invisible short wave light having a wavelength ranging from 100 to 400 nm (1 nanometre = 10-9m).

Ultraviolet light is an effective method of water purification

UV, like distillation, disinfects water without adding chemicals, and therefore possesses some of the same benefits as distillation. It does not create new chemical complexes, nor does it change the taste or odor of the water, and does not remove any beneficial minerals in the water.

Ultraviolet devices are most effective when the water has already been partially treated, and only the cleanest water passes through the UV flow chamber. Niagara+ UV Purifiers use both a sediment and a carbon filter to clean the water prior to passing it through the UV light, to provide complete water quality solutions.

Ultraviolet light is a natural, cost effective, environmentally friendly disinfection process for use in homes where healthy water is a concern.

UV Applications

Well Water
Many rural homeowners who draw their water from private wells assume that their water is safe. Unless the water has been tested, however, there is no way to know whether it contains potentially harmful pathogens. A coliform count indicates that a well is contaminated. Faulty sewage or manure systems or field run-off can be sources of the contamination.

Many livestock producers wish to protect their animals from poor water quality and install water treatment systems that incorporate UV for disinfection.

Surface Water
In many rural regions, homes and cottages draw their water directly from lakes or streams, which collect potentially harmful storm run-off. Add that many animals live in these lakes and streams, and the likelihood of microbial contamination in these supplies is high. Again, the water can be tested, and a coliform count will indicate whether the water should be disinfected.

As with any water supply, the level of contamination can vary throughout the seasons. Water is most likely to be contaminated with microorganisms during rainy season when levels are high and run-off peaks. Consequently, the rainy season is an ideal time to test your water.

Testing private water supplies is typically necessary before selling a rural home. But often only then do water contamination problems become known. If a problem does exist, vendors must often prove that the water is safe before the prospective buyers will take ownership. Installing an ultraviolet water disinfection system is an effective, straightforward way to solve these types of water contamination problems.

Public Water Supplies
Even people in communities served by municipally treated water are installing UV systems. Concerns over the health affects of chlorine have prompted many families to de-chlorinate their water. Some of these families use UV systems to disinfect their de-chlorinated water. Others install UV systems to back up the municipal treatment process.

Commercial Water
Restaurants, hotels, resorts, and campgrounds must supply safe water to their guests. Many of these establishments now employ UV disinfection systems because they are simpler and easier to handle than chlorination systems.

As well, the sick and elderly are more susceptible to waterborne pathogens than are the young and healthy. Consequently, hospitals and nursing homes must keep their water free from microbial contamination. The medical industry also incorporates UV into essential processes such as dialysis.

Process Water for Industry
Factories and laboratories with low water use but high quality requirements can take advantage of UV disinfection systems to treat their water. Some processes are unable to tolerate chlorine, and the food and beverage industry wants to eliminate the odour and taste of chlorine from their products.

Ultraviolet dosage required to destroy greater than 99.9% of micro-organisms. Measured in microwatt seconds per centimeter squared.

BACTERIA

Agrobacterium tumefaciens 8500
Bacillus anthracis 8700
Bacillus megaterium (vegatative) 2500
Bacillus subtills (vegatative) 11000
Clostridium Tetani 22000
Corynebacterium diphtheria's 6500
Escherichia coli 7000
Legionella bozemanii 3500
Legionella dumoffil 5500
Legionella micdadel 3100
Legionella longbeachae 2900
Legionella pneumophilla (legionnaires disease) 3800
Leptospira intrrogans (Infectious Jaundice) 6000
Mycobaterium tuberculosis 10000
Neisseria catarrhalls 8500
Proteus vulgaris 6600
Pseudomonas seruginosa (laboratory strain) 3900
Pseudomonas aeruginosa (environmental strain) 10500
Rhodospirllum rubrum 6200
Salmonella enteritidis 7800
Salmonella paratyphi (enteric fever) 6100
Salmonella typhimunum 15200
Salmonella typhosa (typhoid fever) 6000
Sarcina Lutea 26400
Seratia marcescens 6200
Shigella dysenterai (dysentery) 4200
Shigella Flexneri (dysentery) 3400
Shigella sonnell 7000
Staphylococcus epidermidis 5800
Staphylococcus aureus 7000
Streptococcus faecalls 10000
Streptococcus hemolyicus 5500
Streptococcus lactis 8800
Viridans streptococci 3800
Vibrio cholerae 6500


YEAST

Bakers yeast 8800
Brewers yeast 6600
Common yeast cake 13200


MOLD SPORES

Penicillum digitatum (olive) 8800
Penicillum expensum (olive) 22000
PeniciHum roqueforti (green) 26400


ALGAE

Chlorella vulgaris (algae) 22000


VIRUSES

Bacteriophage (E. coli) 6600
Hepatitis virus 8000
Influenza virus 6600
Pollovirus (pllomyelitis) 2100
Rotavirus 2400

 
 

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