iDuron UV Disinfection System
iDuron is a modular open channel UV disinfection system setting the standard for efficiency and serviceability. It is ideal for disinfection of mid-sized to large sized wastewater treatment plants.
Module and Configuration
- 45°vertical inclined staggered lamp arrangement for ideal mixing and uniform irradiation
- Modular concept allowing project-specific flexibility design
- Easy access to lamps and quartz sleeves
- Low headloss design
- 3rd party validated design
Ecoray Lamps and Electronic Ballast
- Energy efficient with variable power
- Long life lamp and ballast combination
- Easily serviced
- Touchscreen interface
- Local / off / remote switch.
- SCADA for remote monitoring and control
- Ensuring optimum disinfection under all conditions
- Automatic UV lamp dimming
- Automatic UV bank switching
- Automatic UV channel switching
- Resulting in high electrical efficiency
- Automatic wiping during operation
- By mechanical means only
- No use of chemicals
- Electrically driven, no need for hydraulic oils
- Long wiper lifetime
- Easy replacement of wipers
- Compact cabinet design
- Easy to access components
- Ballast card replacement in < 5 minutes
- Variable lamp power controls
Superior ease of use
Central to the design is how easily and efficiently the iDuron UV system is maintained and serviced.
Easy and fast lamp replacement can be conducted while the modules remain in the channel.
Cleaning is simple and safe thanks to the iDuron's automatic, chemical-free electrical wiper system. The wiper rings consist of a unique material combination, proven effective even in waters with high fouling potential.
Only some maintenance tasks, such as wiper ring or sensor replacement, require lifting the frame with the UV module out of the channel with the help of a crane.
The iDuron's electrical components are located out of the water and are easily accessible. Ballast cards are separated from UV lamp modules for easy maintenance and operational stability. Cabinets are rated for either indoor or outdoor service, providing added flexibility in constructing or retrofitting the plant.
UV stands for ultraviolet light which is a specific range of the electromagnetic spectrum
Disinfection Mechanism of UV
DNA & RNA absorb light in the UVC range emitted by UV lamps. The microorganisms are inactivated within seconds and rendered unable to reproduce or infect.
Why UV for wastewater disinfection?
With correct UV light dose bacteria, viruses and other pathogenic microorganisms are safely inactivated within seconds. It requires small footprint as short channels are needed. Being a non-chemical disinfection method, it eliminates dangerous and costly storage of dangerous chemical disinfectants.
Advantage of UV over Chlorine
Affects taste & odor, change in water chemistry
No effect on taste & odor, no change in water chemistry
Produces harmful disinfection by-products (DBPs) (carcinogenic)
No formation of harmful DBP’s
Requires specific ESH procedures
as it is a hazardous and toxic chemical
Low ESH requirements and concerns
Long contact time (min. 30 min)
Short contact time (< 5 sec) reduces size of civil structures
Large footprint, deep excavations
Small footprint (~ 10% of chlorine), low excavations
Low efficiency on protozoa
High efficiency on protozoa
Performance influenced by pH and temperature
Performance independent of pH levels and temperature
The iDuron is a modular open channel system based on Xylem’s advanced and efficient UV disinfection technology. It has broad capacity to inactivate bacteria, viruses and other pathogenic microorganisms. The iDuron is ideal for disinfection of mid-size to large wastewater treatment plants.
Design Aspects for UV
Design Parameter: Disinfection Target = UV Dose
The design UV dose is determined by the log inactivation requirement and the UV sensitivity of the target pathogen(s)!
Design Parameter: Flow
To design UV disinfection system peak flow, average flow and minimum flow should be known.
When flow ↑ retention time ↓ UV dose ↓
When flow ↓ retention time ↑ UV dose ↑
Design Parameter: UV Transmittance.
UVT or UV transmittance is the measurement of amount of ultravoilet light at a wavelength of 254 nm that passes through 1cm of water sample compared to the amount of light that passes through pure water sample. This measurement is expressed in % UVT.
UVT is an important design parameter for determining the UV disinfection requirement. The effectiveness of UV disinfection system is determined by the dose that the system is able to deliver to the target microorganisms in the water. The effective UV dose is dependent primarily on the combined effects of the UV light intensity, the exposure time and the UVT.
Generally, UVT measurements are used to optimize energy efficiency and to ensure adequate dosage by the UV disinfection system.