LAZUR-M50
Disinfecting ULTRA-VIOLET unit

1. Unit Description
The Lazur-M unit is designed for disinfecting drinking from various sources. The unit can be applied for disinfection of potable water at small settlements, recreational and educational facilities, rehabilitation centres, rest homes, medical centres, hospitals, agricultural cooperatives, meat and dairy industries, as well as in other commercial/industrial sites  that would usually use chlorine, chlorine-based products or ozone for disinfection. The main feature of the unit is the use of an emitter fitted with a disinfecting lamp that produces ultra-violet radiation at wavelengths of 253.7 nm (80%) and 185 nm (20% of the combined radiation power) within the wavelength range of 180-260 nm.

2. Technical data
2.1. Quality of untreated water:
general mineral content up to 15 g/litre
turbidity up to 3 mg/litre
colour up to 50 degrees
iron not exceeding 0.3 mg/litre
temperature of water and ambient air from +4 ⁰C to +50 ⁰C
content of non-spore-forming bacteria, (E-coli type) up to 10⁶ m.kl/litre
content of spore-forming bacteria, (B-cereus) up to 10⁵
content of dissolved oil-based products up 10 mg/litre
2.2. Quality of treated water:
colour up to 30 degrees
content of non-spore-forming bacteria, (E-coli type) 0
content of spore-forming bacteria (B-cereus) 0
general number of microbes less than 50
2.3 UV radiation not less than 40.0 mJ/cm²
2.4 Output 50 m³/hour
2.5 Power consumption less than 700 W
2.6 Power source (AC) nominal 220 V ± 5%, 50 Hz
2.7 Level of Protection for Power Supply Unit IP55
2.8 Flange size 100 mm nominal
2.9 Time before ready for operation not more than 1 sec.
2.10 Lamp Service Life (operating hours) not less than 9000 hours


3. Unit Design
The unit consists of a photo-chemical reactor (see Fig.) completed with five in-built Ultraviolet-Emitters, four ultra-sound transducers and a power supply unit. The photo-chemical reactor consists of ahermetic casing fitted with flanged inlet and outlet connectors. The casing houses five Ultraviolet-emitters , each having a low-pressure gas-discharge lamp in a protective jacket that is permeable for ultra-violet radiation at 180-300 nm wavelength. The lamp is hermetically sealed to provide better radiation. The emitters have flange seals. The lamp connecting wires are protected by caps passing through holes in them to power supply devices located within the power supply unit. Transducers are located in the middle and at the ends of the casing. A device for measuring the radiation intensity is located on the photo-chemical reactor. Two drain cocks are installed at the flange connections, these can be used for taking water samples. There are two mounting brackets on the casing for either vertical or horizontal installation. Inside the power supply unit, there are five power boxes for emitters and four power boxes for transducers. The power boxes are wired to the emitters and transducers via electric connectors. Power is connected to the power boxes through switches (located on the front panel) and electric connectors. The front panel also houses emitter/transducer operation indicators, radiation intensity gauge and operating time meter.

4. Operation Principle
During the disinfecting process, the ultrasound transducers foster cavitation in the treated water that destroys the membranes of pathogenic bacteria, and facilitates the formation of free radicals that enhances the effectiveness of further treatment by Ultraviolet radiation in the photo-chemical reactor, and also fosters the creation of ozone (that gets hydrolysed in the casing outlet) which results in an intensive oxidation of organic matter and prevents biological- and mineral build-up on the emitters and the reactor casing.


5. Maintenance
The unit is a very reliable and trouble-free device that operates without any need for regular supervision or maintenance, subject to the above stated requirements for the quality and pressure of incoming water are met.