DRINKING WATER

The problematic

In a more and more normalized environment, local communities have the duty to secure water from the networks and to render it drinkable.
The conventional way of treating drinking water with chlorination is efficient, but leads to the formation of disinfection by-products which modify the organoleptic properties of the water.
What’s more, chlorination is insufficient to destroy protozoa such as Giardia and Cryptosporidium.
It is therefore necessary to implement an efficient treatment which does not change the organoleptic qualities of the water whilst at the same time completely eradicating the pathogenic microorganisms.
Today we see multi-barrier approaches being put into place more and more frequently in the field of water disinfection: in this area, UV is an excellent complement to chlorination.

Solutions

Sterilization with ultraviolet is considered to be one of the most effective disinfection-techniques against bacteria, viruses and protozoa.

It is a physical treatment which disinfects by using the UVC light spectrum at a wavelength of 254 nm.

The nucleic acids (DNA and RNA) of the microorganisms are damaged by radiation from the UV lamps, thus leading to their immediate destruction.

The germicidal effectiveness of UV reactors depends on several factors:

>> the quality of the water (transmittance)
>> the flow rate
>> the UVC –dose delivered
>> the duration of contact

Characteristics

To size our equipment we use a modelling software developed by our research department to ensure a UV dose of 40 mj/cm2 at the end of the lamps’ lifespan (Standard NF EN 14897+A1), and so reducing the pressure loss to the maximum.

The first of our sterilizers has been validated for 60m3/h at 40mj/cm2 by biodosimetry, in compliance with the German standard DVGW294W. Two other devices are in the process of being validated for an average flow of 20 m3/h and 500m3/h.

>> Inlet/Outlet flange in stainless steel 316 L – Type 01A PN 10/16 ≤ DN 150 and PN 10 ≥ DN 200 (PN16 option).

>> High transparency UV quartz sleeve.
>> Low pressure amalgam UV lamp, guaranteed for 16 000 hrs or 2 years.
>> Steel , epoxy coated electrical cabinet for interior, or polyester double doors for exterior installation.
>> UV intensity sensor complying with the DVGW standard, with alarm and pre-alarm, display in W/m2 and alarm for the service life of the lamps.
>> UV intensity sensor complying with the DVGW standard, with alarm and pre-alarm, display in W/m2 and alarm for the service life of the lamps.
>> Remote control and alarms (lamp error signal, alarm buzzer).
- 4-20 mA output, allowing remote processing.
- Dry contact input: UV lamps on/off
- Analog input: regulation UV intensity according to the water flow rate (option).
- Dry contact output: dry contact for alarm lamp(s), automatic cleaning alarm, alarm and pre-alarm analogue output: UV intensity.

Advantages

>> Guaranteed lifespan of the lamps 16 000 hrs or 2 years
>> Low energy consumption thanks to our low pressure UV lamps
>> Low maintenance costs: operating costs are reduced to replacement of the lamps and cleaning of the sleeves
>> Possibility of custom-built reactors to meet specific client requirements

>> Horizontal or vertical installation
>> Lamps can be changed without emptying the stainless steel body
>> Manufactured in France
>> UVGERMI tests all its devices in its own test laboratory