UV

UV Water Treatment
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Powerline10 kW 250      Powerline10 kW 300      Powerline 600 Joules per m2      Powerline Dimensions    
  UV-W

Disinfection is a fundamental step in modern water treatment. UV disinfection is being used to an ever increasing extent as a safe, chemical-free and reliable disinfection process.

With UV disinfection, the water to be disinfected is irradiated with ultraviolet light, which involves a purely physical, chemical-free process for water disinfection. UV-C radiation in particular, with a wavelength in the 240 to 280 nm range, attacks the vital DNA of the bacteria directly. The radiation initiates a photochemical reaction and destroys the genetic information contained in the DNA. The bacteria lose their reproduction capability and are destroyed. Even parasites such as Cryptosporidia or Giardia, which are extremely resistant to chemical disinfectants, are efficiently reduced.

The initiation of photochemical reactions is utilised in other applications too. The undesirable combined chlorine in swimming pool water is reduced by UV radiation, resulting in enormous fresh water savings. Oxidants such as ozone, chlorine or chlorine dioxide are reliably reduced in the production water used in the food and beverages industry, avoiding the need for costly activated char-coal filters.

Special version systems with special lamps and special composition of the radiation chamber can be used for reduction of TOC (Total Organic Carbon) in the treatment of ultrapure water.

UV disinfection has many advantages:
Immediate and safe destruction of the bacteria without addition of chemica
Photochemical reduction of undesirable substances
No THM or AOX formation, no formation of other undesirable substances
No impairment of odour or taste of the water
No storage and handling of chemicals required
Effect is independent of pH
No reaction vessel or reaction tank required
Low space requirement
Low investment and operating costs with high reliability and efficiency

A large number of UV disinfection systems have been supplied worldwide, for the most diverse applications: On water suppliers and municipal water works for disinfection of drinking water
Food and beverages industry to destroy the bacteria in the water needed for food and beverages production and for disinfection of service water to reduce the chlorine dioxide in the production water
Pharmaceuticals and cosmetics industry to maintain the high microbiological requirements of the production water to destroy residual ozone in the production water without use of activated charcoal filters
Reverse osmosis plants for permeate disinfection
Municipal sewage plants for reduction of the bacterial count in the sewage plant outflow for reduction of the bacterial count in the industrial water extracted from the sewage plant outflow
Horticulture for disinfection of the irrigation water
Spa pools and swimming pools for disinfection of the pool water for chloramine reduction in the pool water Semiconductor industry for reduction of TOC and to maintain the high microbiological requirements of the production water

Description of Dulcodes UV Systems
Basically, Dulcodes UV disinfection systems consist of:
High-quality radiation chambers made from stainless steel (DIN 1.4404 or ANSI 316 Ti) or UV-resistant plastic Lamp protection tubes made from high-quality quartz, easily removable for cleaning purposes
Lamps with a particularly high UV output in the 254 nm range, ensuring an outstanding disinfection characteristic
Highly selective UV sensors with good long-term and temperature stability
UV system controllers and modern electronic ballasts fitted in a control cabinet

The special features of our Dulcodes UV disinfection systems are:
Even irradiation of the entire water flow through optimised system hydraulics, so ensuring outstanding disinfection results
Flow-optimised inlet zone Longitudinal flow against UV lamps with high turbulence
Use of UV lamps with long service life and high UV-C output
Automatic cleaning system for the sleeve of medium-pressure lamps
Manual cleaning system for the sleeve of system type Dulcodes R System controller with comprehensive monitoring and reporting functions
Display of all important operating parameters and reporting of faults in plain text Trend display of the variation of the UV sensor signal with time
Analogue output sensor signal and alarm relay
Use of modern electronic ballasts with bus technology for lamp-friendly ignition and operation Individual lamp monitoring
Direct control of automatic isolation and flushing valves

Dulcodes UV Lamps

Standard low pressure lamp
Robust low-pressure mercury lamp with a life expectancy of approx. 10.000 to 14.000 operating hours.
The operating temperature of the lamp is 30-50 °C, so its use is limited to water temperatures between 5 and 40 °C. The output is approx. 100 W per metre of arc length.
High-Flux low pressure lampLow pressure amalgam lamp with a life expectancy of approx. 8.000 to 10.000 operating hours. The ope-rating temperature of the lamp is 100-130 °C, so that it can also be used with water temperatures up to approx. 70 °C. The output is approx. 200 W per metre of arc length and is independent of water tempe-rature.
Opti-Flux low pressure lamp
Doped high-performance low pressure amalgam lamp with a life expectancy of approx. 14.000 operating hours. The operating temperature of the lamp is 100-130 °C, so that it can also be used with water tem-peratures up to approx. 70 °C. The output is approx. 300 W per metre of arc length and is independent of water temperature.
Powerline medium pressure lamp
Mercury medium pressure lamp with a life expectancy of approx. 8.000 to 10.000 operating hours. The high output of this lamp (up to 10.000 W per metre of arc length) enable very large flows to be treated. Their broad range spectrum makes the lamps particularly suitable for photochemical processes too. The operating temperature of the lamp is 650-850 °C. Powerline medium pressure lamps are normally ope-rated with a mechanical wiper system, so their use is limited to water temperatures up to approx 40 °C.