WASTE WATER

The problematic

Protecting a sensitive environment
Limit the risks of microbial toxicity and contribute to restoring the quality of sensitive water areas: bathing spots, shellfish farms, places where drinking water is extracted. The standards applying to discharge of pathogenic microorganisms are becoming increasingly stringent, especially when the water purification plant is situated in a so-called “sensitive” environment.
Consequently, the integration of a UV reactor at the end of the treatment process allows for elimination of all or part of these pathogenic microorganisms (fecal coliforms, fecal streptococci…).

Reusing waste water
Environmental concerns and the preservation of natural resources encourage the reuse of waste water for industrial purposes (cleaning of floors and vehicles) and for irrigation (watering systems, green areas, golf courses…).

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Solutions

Ultraviolet disinfection is a neutral and eco-friendly technology which has existed for over a century. It is considered to be one of the most effective techniques employed to destroy microorganisms such as 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.

This technology presents several advantages and is more and more used for waste water treatment.

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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 pressure loss to the maximum.

>> Maximum service pressure: 8 bar (higher pressure as an option).
>> Power supply: 220-240 V or 400 Tetra V – 50-60 Hz.
>> 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.
>> Automatic or manual cleaning with pull handle : deposits are liable to form on the quartz sleeves (TSS -Total Suspended Solids-, scaling…) and reduce the UVC intensity of the lamps. It is therefore essential to clean them regularly.
>> 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 of 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
- analog output: UV intensity.

Advantages

>> Low energy consumption thanks to our low pressure UV lamps
>> Guaranteed lifespan of the lamps 16 000 hrs or 2 years
>> 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