Sizing & Calculation - Ultra Violet Radiation is used to Destruct Residual Dissolved Ozone. Residual Ozone Destruction In Pharmaceutical Process Water. UV Energy is used to Destruct unused ozone in Aquaculture & hatcheries.

1. 1
Using U V Energy

2. - Index
2
• What is UV Radiation
• How It Works for Ozone Destruction
• What is UV Dose
• How To Size UV System
• What are the Components of UV System
• Process Flow Diagram
• Models Of UV System
• References

3. - What is UV radiation?
3
• UV stands for Ultraviolet
• UV is invisible spectrum of light
• UV has three sub category - UV – A ; UV – B ; UV – C
• UV – C has 253.7 nm peak wavelength
• UV – C is also called as Germicidal
• UV – C has major three Properties
– Germicidal | Ozone Destruction | Advance Oxidation Process [AOP]

4. - How it Works for Ozone Destruction?
4
• Ozone is a tri atomic compound of Oxygen “O”
• The two atomic compound is Oxygen “O₂”
• This form of Oxygen “O₂” is very stable
• Ozone is “O₃” & one “O” is very unstable.
• UV – C has an energy.
• When UV-C falls on “O₃” the unstable “O” is very easily be separated, breaking
the inter molecular bond
• This “O” combines with another free “O” and becomes stable “O₂”
• This is the way “O₃” in the water is destructed [converted] from “O₃” to “O₂”.

5. - What is UV Dose?
5
• UV dose is a Product of UV intensity at 253.7 nm & Contact time [Exposure Time].
• UV Dose = UV Intensity X Contact Time
[ µW/cm² X Sec. ]
• Measured in “ Microwatts-Seconds per Cm²” [µW-S/cm²] or J/m² or mJ/cm²
• Example = 100 J/m² = 10 mJ/cm² = 10 mW-S/cm² = 10,000 µW-S/cm²

6. - How to Size UV for Ozone Destruction?
6
• There are three factors to size/design UV System
– 1. UV Dose 2. % UVT 3. Ozone Concentration
• 1. UV Dose is intensity of UV light & contact time
• 2. % UVT is the % of UV light penetrating water medium, at given distance.
• 3. Ozone concentration is the residual un-dissolved Ozone in the medium [water]

7. - Components Of UV System
7
• UV Reactor – SS 316 – Sea Water & Ozone Compatible
• UV Driver / Ballast – Electronics
• High % UVT isolator – Quarts Jacket
• Rubber Seals & O-rings – Sea water + UV Radiation + Ozone Compatible

8. - Process Flow Diagram
8
Ozonated Water
Storage Tank
Ozone Destruct UVFeed Water
Pump
Ozone Free Water
To
Culture Tank
ORP SensorCirculation
Loop
Single Pass

9. - Model Selection – Example 1 – 300 W UV Lamp
9
Std. UV Lamp Intensity : 9.0 mW/cm² @ 55.0 mm of 300 W High Intensity Amalgam Lamp
UV Reactor Volume : 30 – 32 L
% UVT : 80 %
Ozone Concentration : 0.4 ppm [G/m³]
Ozone Destruct UV Dose : 120 mW-S/cm² [min.]
Contact Time : 120 mW-S/cm² / 9.0 mW/cm² = 13.3 Sec.
Peak Ozonated [0.4 ppm] : Reactor Volume [L] / Contact Time [Sec.]
water Flow Rate = 30 L / 13.3 Sec.= 2.25 LPS = 8.1 m³/hr (300 w UV Lamp)

10. - Model Selection – Cont... Example 2 - 120 W UV Lamp
10
Std. UV Lamp Intensity : 3.0 mW/cm² @ 50.0 mm of 120 W UV Lamp
UV Reactor Volume : 20 – 22 L
% UVT : 80 %
Ozone Concentration : 0.4 ppm [G/m³]
Ozone Destruct UV Dose : 120 mW-S/cm² [min.]
Contact Time : 120 mW-S/cm² / 3.0 mW/cm² = 40.0 Sec.
Peak Ozonated [0.4 ppm] : Reactor Volume [L] / Contact Time [Sec.]
water Flow Rate = 20 L / 40.0 Sec.= 0.5 LPS = 1.8 m³/hr (120 w UV Lamp)

11. - Model Selection – Cont... Example 3 – 80 W UV Lamp
11
Std. UV Lamp Intensity : 2.0 mW/cm² @ 40.0 mm of 80 W UV Lamp
UV Reactor Volume : 15 – 18 L
% UVT : 80 %
Ozone Concentration : 0.4 ppm [G/m³]
Ozone Destruct UV Dose : 120 mW-S/cm² [min.]
Contact Time : 120 mW-S/cm² / 2.0 mW/cm² = 60.0 Sec.
Peak Ozonated [0.4 ppm] : Reactor Volume [L] / Contact Time [Sec.]
water Flow Rate = 15 L / 60.0 Sec.= 0.25 LPS = 0.9 m³/hr (80 w UV Lamp)

12. - References
12
1. http://www.spartanwatertreatment.com/UV-ozone-destruction.html
2. http://www.aquafineuv.com/UVTechnology/Applications/OzoneDestruction.aspx
3. http://www.ozonia.com/media/pdf/app/pure_water-e.pdf
4. http://www.wcponline.com/pdf/0804%20Electrolytic%20Ozone%20Generation.pdf

13. Thank You
13
Solution Engineer : Mr. Sunil Shah
Contact : +91-93212 34527
Mail ID : sunilshah@chemtronicsindia.com
URL : www.chemtronicsindia.com
www.ozonegeneratorindia.com
www.m.chemtronicsindia.com