UV disinfection water filtration system Ultraviolet germicidal irradiation
UV Disinfection
UV units are appliances suitable for the disinfection of polluted water able to deactivate microbiological pollutants, e.g. bacteria, viruses, moulds, spores, yeasts and so on.
UV disinfection is 99.99% effective
Principle of Operation
Ultraviolet disinfection systems typically utilize thin cylindrical bulbs capable of generating narrow band wavelength UV light in the 254 nm range, placed in close proximity to high-purity glass tubes through which the water flows. The unit must be sized to provide adequate dosage at the specified flowrate. The water to be treated must be sufficiently free of turbidity (sediment), iron, manganese and any colorant that could affect transmission of the 254 nm UV light. Manufacturers' specifications should be consulted.
UV units for water treatment
Special low-pressure mercury vapor lamps produce ultraviolet radiation at 254 nm, the optimal wavelength for disinfection and ozone destruction. The UV lamp never contacts the water; it is either housed in a quartz glass sleeve inside the water chamber or mounted external to the water which flows through UV transparent Teflon tubes. Some ultrapure water systems use 185 nm UV units for reducing TOC (total organic carbon).
Technical parameters:
| model |
Processing capacity (Ton/Hour) |
power (W) |
inlet and outlet
(inch) |
working pressure (Kg/cm 2 ) |
malfunction alert for UV lamp |
reactor dimension (cm) L×W×H |
dimension of panel(cm) |
anchor bolt (cm) |
overall weight (Kg) |
| YLCn-005 |
0.3 |
16 |
1/2" |
6 |
matched |
30×6×11 |
|
|
5 |
| YLCn-008 |
1 |
25 |
1/2" |
6 |
matched |
47×6.3×11 |
|
|
10 |
| YLCn-050 |
2 |
40 |
1" |
6 |
matched |
100×9×20 |
Φ8.9×25
(diameter×length) |
69×4×Φ1 |
25 |
| YLCn-150 |
6 |
80 |
1+1/4" |
6 |
matched |
100×11×23 |
69×4×Φ1 |
30 |
| YLCn-200 |
8 |
120 |
1+1/2" |
6 |
matched |
100×15.9×30 |
Φ8.9×45
(diameter×length) |
69×7×Φ1 |
35 |
| YLCn-300 |
12 |
160 |
2" |
6 |
matched |
100×15.9×32 |
69×7×Φ1 |
40 |
| YLC-050 |
2 |
40 |
DN25/1" |
6 |
matched |
100×8.9×30 |
25×30×12
(L×H×w) |
60×4×Φ1 |
45 |
| YLC-150 |
6 |
80 |
DN32/1 1/4 " |
6 |
matched |
100×10.8×30 |
60×4×Φ1 |
50 |
| YLC-200 |
8 |
120 |
DN40/1 1/2 " |
6 |
matched |
100×15.9×40 |
60×7×Φ1 |
60 |
| YLC-300 |
12 |
160 |
DN50/2" |
6 |
matched |
100×15.9×40 |
60×7×Φ1 |
70 |
| YLC-360 |
15 |
200 |
DN65/2 1/2" |
6 |
matched |
100×15.9×40 |
50×78×25
(L×H×W) |
60×7×Φ1 |
120 |
| YLC-500 |
20 |
240 |
DN65/2 1/2" |
6 |
matched |
100×21.9×50 |
60×11×Φ1.2 |
130 |
| YLC-600 |
25 |
280 |
DN80/3" |
6 |
matched |
100×21.9×50 |
60×11×Φ1.2 |
140 |
| YLC-700 |
30 |
320 |
DN100/4" |
6 |
matched |
100×21.9×50 |
60×11×Φ1.2 |
150 |
| YLC-1000 |
40 |
360 |
DN100/4" |
6 |
matched |
100×21.9×50 |
60×11×Φ1.2 |
160 |
| YLC-1200 |
50 |
400 |
DN125/5" |
6 |
matched |
100×21.9×50 |
60×11×Φ1.2 |
180 |
| YLC-1500 |
60 |
420 |
DN150/6" |
6 |
matched |
170×27.3×57 |
120×16×Φ1.4 |
210 |
| YLC-2000 |
80 |
560 |
DN150/6" |
6 |
matched |
170×27.3×57 |
120×16×Φ1.4 |
220 |
| YLC-2500 |
100 |
700 |
DN150/6" |
6 |
matched |
170×27.3×57 |
60×128×30
(W×H×T)
|
120×16×Φ1.4 |
275 |
| YLC-3000 |
125 |
840 |
DN150/6" |
6 |
matched |
173×27.3×57 |
120×16×Φ1.4 |
300 |
| YLC-4000 |
150 |
1120 |
DN200/8" |
6 |
matched |
173×32.5×65 |
120×20×Φ1.6 |
325 |
| YLC-5000 |
200 |
1400 |
DN200/8" |
6 |
matched |
173×37.7×72 |
120×22×Φ1.6 |
350 |
| YLC-7000 |
300 |
2100 |
DN250/10" |
6 |
matched |
175×42.6×80 |
120×24×Φ2.0 |
400 |
| YLC-10K |
400 |
2520 |
DN250/10" |
6 |
matched |
176×52.9×95 |
60×150×40
(W×H×T) |
120×28×Φ2.2 |
475 |
| YLC-15K |
600 |
3080 |
DN300/12" |
6 |
matched |
176×78×110 |
120×32×Φ2.4 |
600 |
| YLC-20K |
800 |
3920 |
DN350/14" |
6 |
matched |
confirmed |
confirmed |
confirmed |
confirmed |
| YLC-25K |
1000 |
4760 |
DN350/14" |
6 |
matched |
confirmed |
confirmed |
confirmed |
Maintenance requirements for UV units
Lamp Replacement
UV lamps do not burn out as normal florescent lamps do. Instead, the UV lamps will solarize, reducing their intensity to about 60% of a new lamp after about one year of continuous use. When lamps are new, they will generate a dosage level near 60,000 µW-s/cm2 . When the dosage drops to 30,000 µW-s/cm2 (the minimum dosage needed to effectively kill bacteria) lamps should be replaced. Lamp life will be shortened significantly if the lamp is turned on and off more frequently than once every eight hours.
Monitoring Performance
Water should be sampled and tested for bacteria counts regularly. Sample before and after the UV unit to test its performance. Water should also be sampled in the animal rooms since bacteria regrowth can occur downstream of the UV unit.
Cleaning
As water passes through the UV unit, minerals, debris and other material in the water will deposit out and onto the quartz or Teflon sleeve. This will limit the penetration of UV rays through the sleeve and into the water. To maintain high clarity, the glass around the lamp must be cleaned regularly. Cleaning frequency depends on the water quality and will be minimal with RO, distilled, or deionized water.
Monitoring UV Dosage
UV light intensity meters are available which indicate the penetration of UV light through the glass sleeve and the water. Low intensity means the UV dose is too low to provide adequate disinfection. This meter will indicate when cleaning or lamp replacement is needed
FAQ:
Q. Does the water have to sit in the UV sterilizer to be disinfected?
A. No. If the system is sized correctly, the water is disinfected as it flows through.
Q. What if the water flows faster than is allowed through the system?
A. If the flow rate exceeds the design flow rate of the UV sterilizer, then there is a possibility that the water will not be properly disinfected. It is important to use a flow restrictor so that the flow rate cannot be exceeded.
Q. How long does the lamp last?
A. The lamps last approximately 10,000 hours. That is why we recommend replacement approximately every 12 - 14 months of continuous operation. After this period, the lamp itself becomes solarized and blocks the rays form entering the water.
Q. Are these systems bigger energy users?
A. No. The 12 gallon per minute model, for instance uses only 39 watts, about half the amount an ordinary light bulb uses.
Q. My water is sometimes cloudy. Is that a problem?
A. Yes. The water that enters the ultraviolet sterilizer must be absolutely clear and have a turbidity of less than 1 NTU. If your water is cloudy, then it must be pretreated.
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