Ultra Violet Sterilizing Water Purification
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.
Working Principle
Ultra-violet (UV) light kills disease-causing micro-organisms such asEcoli with a 99.9% effectiveness. UV sterilization adds nothing to, and removes nothing from the water and is extremely cost effective by volume. UV Water Sterilization technology seeks to use the same process as nature to provide drinking water that is completely safe.By exposing contaminated water to high intensity UV light, disease
causing micro-organisms are rendered harmless and the water produced is safe, clean and fresh.
In nature, the sun produces UV rays which have a germicidal effect on disease causing pathogens in water. When these contaminants are exposed to UV light, they are rendered harmless and the output water is considered disinfected. Additional water filters are available for any system to filter out sediments, odors, bad tastes water sterilization units will provide an adequate UV dose to kill the following contaminants among many others:
1. Ecoli
2. Salmonella
3. Legionella Pneumophilia
4. Mycobacterium Tuberculosis
5. Poliovirus
6. Hepatitis
7. Cholera
8. Streptococcus
UV sterilization affects waterborne contaminants and disease causing pathogens with a
99.9% kill rate. The result is high quality water exceeding all health department standards.
Factors Affecting UV Treatment:
Because UV does not leave any measurable residue in the water, it is recommended
that the UV sterilizer be installed as the final step of treatment and located as close as
possible to the final distribution system. Once the quality of the water source has been
determined, you will need to look at things that will inhibit the UV from functioning
properly (i.e. manganese, TDE, turbidity and suspended solids).
Iron and Manganese will cause staining on the quartz sleeve and prevent UV energy
from transmitting into the water levels as low as 0.03 ppm of iron and 0.05 ppm of manganese. Proper pre-treatment is required to eliminates this staining problem.
Total Dissolved Solids (TDS) should not exceed approximately 500ppm. There are many
factors that make up this equation, such as the particular make up of the dissolved solids
and how fast they absorb the available UV energy. Calcium and magnesium, in high
amounts, has a tendency to build up on the quartz sleeve, again impeding the UV
energy from penetrating the water.
Turbidity: is the inability of light to travel through water. Turbidity makes water cloudy and
aesthetically unpleasant. In the case of UV, light levels over 1NTU can shield microorganisms from UV energy, making the process ineffective.
Suspended Solids: need to be reduced to a maximum of 5 microns in size. Larger solids
have the potential of harboring or encompassing the micro organisms and preventing
the necessary UV exposure. Pre-filtering is a must on all UV applications to effectively estroy micro organisms to a 99.9% kill rate.
Is UV 100% effective?
UV disinfection typically offers a 98% reduction in both bacteria and virus and is more effective than chemical disinfection processes at destroying viruses.
Does UV remove E. coli?
Yes, E. coli requires a UV dose of between 6 to 12 mJ/cm2 to achieve 4-log disinfection. This is well within the capabilities of the Sterilight UV system.
How much does it cost to operate? UV systems are extremely economical to operate.
A typical household UV system operates on the same power requirements as a 40 watt light bulb!
Will UV change the taste or smell of my water?
UV is a physical disinfection process, no additives are required. It does not change the taste or odour of the water. It simply provides safe reliable disinfection.
How do I know the system is working?
All UV systems come with "lamp-out" monitors which give an audible and visual signal in case of lamp failure. Sterilight GOLD systems incorporate true UV intensity monitors so an alarm will sound if the disinfection effectiveness falls below a safe level.
Why do I need Disinfection?
Disinfection is required on all water supplies that are not protected by a municipal water source. Due to the uncertainties that exist within some water systems, we can no longer rely on the fact that our water supplies "may be safe." By providing your own disinfection, you are taking the responsibility of ensuring the safety of the water supply for you and your family.
Limitations in UV Water Filters
As remarkable as the technology is, ultraviolet water purification by itself is not enough to render water completely safe for drinking purposes. That's because UV radiation works only on microorganisms such as bacteria and viruses. UV light is of little use in eliminating other contaminants in water such as chlorine, heavy metals and VOC's (Volatile Organic Compounds).
VOCs are toxic, man-made chemicals that leach into ground water during the manufacture of products such as paints, petroleum products and refrigerants.
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.villas, 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
Advantages of commercial and residential Ultraviolet Water Sterilizer SystemsNo chemicals added to the water supply - no byproducts, (i.e. chlorine + organics = trihalomethanes).
Environmentally and user friendly, no dangerous chemicals to handle or store, no risks of overdosing.
Easy installation, only two water connections and a power connection.
No change in taste, odor, pH or conductivity or the general chemistry of the water.
More effective against viruses than chlorine.
Extremely economical, hundreds of gallons may be treated for each penny of operating cost.
Immediate treatment process, no need for holding tanks, long retention times, etc.
Automatic operation without special attention or measurement, operator friendly.
Simplicity and ease of maintenance, periodic cleaning, (if applicable), and annual lamp replacement, no moving parts to wear out.
No handling of toxic chemicals, no need for specialized storage requirements.
Low initial capital cost as well as reduced operating expenses when compared with similar technologies such as ozone, chlorine, etc.
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)
Technical parameters sheet
| model |
capacity |
Power |
inlet-outlet |
reactor |
panel |
Anchor |
G weight |
| |
m³/hour |
watt |
mm |
L×W×H |
|
screw |
Kg |
| YLCn-005 |
0.3 |
16 |
1/2″ |
30×6×11 |
|
|
5 |
| YLCn-008 |
1 |
25 |
1/2″ |
47×6.3×11 |
|
|
10 |
| YLCn-050 |
2 |
40 |
1″ |
100×9×20 |
Φ8.9×25
(d×L) |
69×4×Φ1 |
25 |
| YLCn-150 |
6 |
80 |
1+1/4″ |
100×11×23 |
|
×Φ1 |
30 |
| YLCn-200 |
8 |
120 |
1+1/2″ |
100×15.9×30 |
Φ8.9×45
(d×L) |
69×7×Φ1 |
35 |
| YLCn-300 |
12 |
160 |
2″ |
100×15.9×32 |
|
69×7×Φ1 |
40 |
| YLC-050 |
2 |
40 |
DN25/1″ |
100×8.9×30 |
25×30×12
(W×H×D) |
60×4×Φ1 |
45 |
| YLC-150 |
6 |
80 |
DN32/11/4″ |
100×10.8×30 |
|
60×4×Φ1 |
50 |
| YLC-200 |
8 |
120 |
DN40/11/2″ |
× |
|
60×7×Φ1 |
60 |
| YLC-300 |
12 |
160 |
DN50/2″ |
100×15.9×40 |
|
×Φ1 |
70 |
| YLC-360 |
15 |
200 |
DN65/21/2″ |
100×15.9×40 |
|
60×7×Φ1 |
120 |
| YLC-500 |
20 |
240 |
DN65/21/2″ |
× |
|
60×11×Φ1.2 |
130 |
| YLC-600 |
25 |
280 |
DN80/3″ |
100×21.9×50 |
|
60×11×Φ1.2 |
140 |
| YLC-700 |
30 |
320 |
DN100/4″ |
100×21.9×50 |
|
60×11×Φ1.2 |
150 |
| YLC-1000 |
40 |
360 |
DN100/4″ |
100×21.9×50 |
|
×Φ1.2 |
160 |
| YLC-1200 |
50 |
400 |
DN125/5″ |
100×21.9×50 |
|
60×11×Φ1.2 |
180 |
| YLC-1500 |
60 |
420 |
″ |
× |
|
120×16×Φ1.4 |
210 |
| YLC-2000 |
80 |
560 |
DN150/6″ |
170×27.3×57 |
|
120×16×Φ1.4 |
220 |
| YLC-2500 |
100 |
700 |
DN150/6″ |
170×27.3×57 |
60×128×30
× |
120×16×Φ1.4 |
275 |
| YLC-3000 |
125 |
840 |
DN150/6″ |
170×27.3×57 |
|
120×16×Φ1.4 |
300 |
| YLC-4000 |
150 |
1120 |
DN200/8″ |
173×32.5×65 |
|
120×20×Φ1.6 |
325 |
| YLC-5000 |
200 |
1400 |
DN200/8″ |
173×37.7×72 |
|
120×22×Φ1.6 |
350 |
| YLC-7000 |
300 |
2100 |
″ |
175×42.6×80 |
|
120×24×Φ2.0 |
400 |
| YLC-10K |
400 |
2520 |
DN250/10″ |
176×52.9×95 |
60×150×40
× |
120×22×Φ2.2 |
475 |
| YLC-15K |
600 |
3080 |
DN300/12″ |
176×78×110 |
|
120×32×Φ2.4 |
600 |
| YLC-20K |
800 |
3920 |
″ |
Designated |
Designated |
Designated |
Designated |
| YLC-25K |
1000 |
4760 |
DN350/14″ |
Designated |
Designated |
Designated |
Designated |
Installation instructions
1.Before install this equipment,please test the voltage for connection.normal running for UV lamp and ballast requires 240V.
2.There should be a 1.5 meter space for spared at each end(at least one end)for disassemble the quartz tube and UV lamp.then connect the water inlet and outlet
3.After connected the inlet and outlet pipe,then release the water to check whether there is any leakage at the nut connection.if it is leakage,screw the nut or check the sealing ring is cracked or not.pipe.please do not use too much force when screw the nut to avoid any cracking of tube.
4.The supporting frame must be grounding.
5.The UV lamp is inserted into the quartz tube through the nut with holes. the electric control panel is connected with 4-core plug and UV lamp. while connecting, two hands should handle the pin end and 4 core plug end respectively. Insert into plug slowly to avoid possible break-up because of corrosion.
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