Ultra violet water sterilisation disinfection for swimming pools



Advantage


Most effective when run 24/7.
Most effective if the water is clear.
Most effective if bulb is new, or replaced regularly (at least every 6-8 months).
Most effective if the UV light penetrates less than one inch of water.
Effectiveness can be hindered if the water passes to fast past the bulb.
Most effective if the exposure time of the water to the UV light is longer than one second.
The effectiveness of UV light can be hindered if there is light blockage, i.e. a salt encrusted bulb.
It can help to prevent future water borne pathogen reoccurrences, once the initial problem as been completely eradicated from the pond.
UV light not only kills unwanted organisms, but beneficial ones as well.
Should never be run when treating with any drugs or medications.
UV can also alter the structure of some dissolved chemical compounds.
UV light can be damaging to the human eye, so DO NOT look into the bulb.
Always unplug the unit when working on it to prevent possible shock if it breaks or gets wet.


Application

1. Food processing and industrial water disinfection
 
2. Hospitals, various laboratory water disinfection, and high levels of pathogenic water disinfection
 
3. Municipal water
 
4. Biochemical pharmaceutical, cosmetics production water disinfection
 
5. Aquatic products processing water disinfection
 
6. Swimming pool water disinfection
 
7. Seawater, freshwater aquaculture breeding water disinfection
 
8. Ultra-pure water for electronic industry, and so on
 




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

Maximum Concentration Levels (Very Important)
Iron≤ 0.3ppm(0.3mg/L)
Hardness≤ 7gpg(120mg/L)
Turbidity≤ 1NTU
Manganese≤ 0.05ppm(0.05mg/L)
Tannins≤ 0.1ppm(0.3mg/L)
UV Transmittance≥ 750‰

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
(μ W-s/cm2)
Note: 1000μ W-s/cm2=1mj/cm2(milli-joule/cm2)

As a general guideline, the following are some typical UV transmission rates (UVT)
City water supplies850-980‰
De-ionized or Reverse Osmosis water950-980‰
Surface waters(lakes, rivers, etc)700-900‰
Ground water(wells)900-950‰
Other liquids10-990‰