| Customization: | Available |
|---|---|
| Theory: | UV Light Sterilization |
| Type: | Lightwave Disinfection |
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UV Sterilizers
Interest in the use of UV light for supplemental water disinfection has increased in response to state and local health regulations covering public pools and spas. Halogens, such as chlorine and bromine, and sanitizers are used to treat waterborne pathogens in pool and hot tub water; however, many commercial pool operators and some residential pool owners are incorporating a supplemental disinfection system to assist in combating recreational water illnesses such as cryptosporidium and giardia. Ultraviolet (UV-C) water treatment technology is one such technique that has seen increased popularity thanks to its ease of use, reduced chemical consumption, health advantages and environmentally friendly benefits. UV-C light can improve water and air quality in aquatic facilities.
UV-C is an invisible light with a wavelength shorter than that of visible light but longer than X-rays. Its connection to water sanitation was discovered more than 100 years ago when European scientists learned the top surface of lake water was sterile when exposed to sunlight. This eventually led to the invention of UV-C bulbs. The spectrum of UV light can be subdivided into four main categories, UV-A, UV-B, UV-C and Vacuum UV. The area between 280 and 100 nanometers is UV-C, also known as germicidal light.
How does it work?
UV sanitation systems eliminate chlorine-resistant microorganisms, which are common causes of pool closures. These systems reproduce UV radiation inside light chambers via powerful lamps, which emit germicidal UV-C light that is used to disinfect pool and spa water. Facilities equipped with these systems consume fewer chemicals and allow sterilizers to be more effective. How much more effective depends on the water's hardness, pH and other water chemistry factors. UV-C causes permanent damage to a number of microorganisms almost instantly as the water circulates through the light chamber. By disrupting the microorganism's DNA, protozoans, viruses and bacteria are unable to replicate and remain inert. This light, however, works only on water that flows through the chamber. Water in dead zones isn't treated by the light and the light does not act as a residual, thus the need for the presence of a halogen. The effects of UV-C are immediate and do not alter the water's composition.
Application
1.Food processing industry, including juices, milk, drinks, beer, practical oil and canned food.
2.Electronic industry.
3.Hospitals, various laboratory and high levels of pathogenic body water disinfection.
4.Households building, residential, office buildings, hotels, restaurants, water factories.
5.Purification and disinfection of shellfish, fish cleaning and disinfection
6.outdoors camp, field water supply system
7.Urban wastewater disinfection.
8.Swimming pool, other recreational water disinfection
9.Thermal power, nuclear power plant industrial, central air conditioning system cooling water.
10.Biological, chemical and pharmaceutical, cosmetics for the production of cooling water.
11.Sea water, fresh water breeding, aquaculture water
12.Agricultural water disinfection
UV specification
Product application
Ultraviolet light treatment is a widely recognized and proven method of disinfection of water and has several advantage over other disinfection methods such as chlorination, ozonation, etc.UV light does not add anything to the water ,such as ,undesirable color ,odor , taste , or flavor ,nor does it generate harmful byproducts. It adds only energy in the UV radiation. Also, UV disinfection requires only a fraction of the contact times required by other disinfection methods. It is fast, efficient, effective, economical and environmentally-friendly.
Principle of Operation
UV water disinfection system design has been carefully conceived to provide adequate germicidal dosage throughout the disinfection chamber. The dosage, as it applies to UV disinfection, is a function of time and the intensity of UV radiation to which the water is exposed. Exposure time is related to the flow rate, the higher the flow rate, the lower the exposure time or the lower the flow rate, the higher the exposure time. The UV intensity is the amount of energy, per unit time, emitted by germicidal lamp. The Dosage is the product of UV intensity and the exposure time.
Limitation of Use
The UV water disinfection system NOT intended for the treatment of water that has an obvious contamination or intentional source, such as raw sewage, nor is the unit intended to convert wastewater to microbiologically safe drinking water.
Water Quality (in)
Water quality plays a major role in the transmission of germicidal UV rays. It is recommended that the water does not exceed following maximum concentration levels
Effectively treating water with higher concentration levels than listed above can be accomplished, but may require added measures to improve water quality to treatable levels. If, for any reason, it is believed the UV transmission is not satisfactory, contact the factory.
UV wavelength (nm)
DOSAGE is the product of intensity & time
dosage=intensity*time=micro watt/cm2*time=microwatt-seconds per square centimeter
(μW-s/cm2)
Note:1000μW-s/cm2=1mj/cm2(milli-joule/cm2)
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