Ultra Violet Sterilisers
Main principles Dutch Mill Ultra Violet
Sterilisers
Short-wave ultraviolet rays predominantly at 254 nm wavelength
have the unique ability to kill micro-organism. Low-pressure mercury
germicidal lamps, whose special hard glass is transparent to energy at
these wavelengths, radiates ultraviolet rays. The rays then penetrate
the outer membrane of bacteria, virus, yeast, mould and algae. They
strike and destroy the DNA that allows the organism to live and
reproduce. It safely and efficiently eliminates the drawback of
chemical sterilisation, corrosion from added chemicals, chemical
feeders and monitoring devices. Dutch Mill Ultraviolet Sterilisers
produce bacteria-free water, completely unchanged in pH, colour, taste,
odour, conductivity and temperature.
The Ultraviolet lamp never contacts water, because it is
housed in a special quartz tube. Quartz tubes are used for their
excellent UV-ray transmittance, typically 95%. Inside the sterilizer
water contacts a turbulence-creating disc. The water is forced
tangentially through the chamber, spinning rapidly over and around the
quartz tube.
This system maximises the time microorganism spends next to the
UV-source and ensures that the microorganism receive the required
amount of UV-energy.
Dutch Mill quartz tubes mounted within the sterilizer chamber maximize
ultraviolet intensity. So while most bacteria require 13.000 units
(micro watt seconds/cm2 at 254 nm) for complete destruction, the
international shipping laws require a minimum of 16.000 microwatts
seconds/cm2 at the end of 7.000 hours lamp operation.
However, the Dutch Mill Ultra Violet Sterilisers provide more than
30.000-microwatt seconds/cm2 depending on rated flow and an absorption
coefficient of 0,6.
The Installation
contains:
- Stainless steel housing, to eliminate the problems
caused by corrosion
- Hour counter
- Lamp radiation guard
Advantages of the Dutch Mill Ultra Violet
Sterilisers
- Environmentally friendly, no dangerous chemicals to
handle or store and no danger of overdosing
- Low maintenance costs
- Immediate treatment, no need for retention times and
holding tanks.
- No change in pH, colour, taste, odour, conductivity
and temperature of the treated water
- Easy installation
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Dutch Mill UV 5
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Types Dutch Mill Ultra Violet Sterilisers
Type
|
Capacity
(m3/h)
|
Height
(mm)
|
Depth
(mm)
|
Width
(mm)
|
Weight
(kg)
|
UV - 5 |
5
|
1000
|
270
|
170
|
5
|
UV - 10 |
10
|
1000
|
270
|
300
|
10
|
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