Comparison of low-pressure and medium-pressure UV disinfection performance in water treatment applications

In the water treatment disinfection system, ultraviolet disinfection has always occupied an important position, low-pressure, medium-pressure ultraviolet sterilizer is commonly used ultraviolet disinfection equipment.

Low-pressure UV technology: the pressure of the inert gas inside the lamp is approximately0.013MPaThe lamps are in a negative pressure state. The UV light emitted by the lamp is185nmrespond in singing254nmMonochromatic light spectrum. Conventional low voltage technology with a single lamp power of14-320WThe low-pressure high-intensity lamp technology is based on the traditional low-pressure UV technology, and the power of a single lamp is much higher in the270~800WBetween them, the UV intensity is much stronger.

Low-pressure UV can meet the general treatment capacity of water treatment requirements, and is suitable for frequent opening and closing operation requirements of the system. Low-pressure UV lamps have high conversion efficiency, up to 40% power into sterilization energy, low cost, so widely used in pool water, aquaculture water and other disinfection systems.

 Low-pressure ultraviolet

Medium Pressure UV Technology: The pressure of the inert gas inside the lamp is equal to the atmospheric pressure, which can emit a wider range of multi-wavelength UV rays in the wavelength range of 230-370nm, containing the wavelengths of 245nm, 260nm, 297nm, and 340nm required for the reduction of chloramine.

Therefore, medium pressure UV is more advantageous for pool water disinfection and chloramine elimination applications in swimming pools.

The output of multi-spectrum UV light can decompose urea and degrade chloramine in the water body, and at the same time effectively enhance the water body penetration rate. Medium-pressure UV work is basically not affected by temperature, and can work normally in the range of 0~80℃ water temperature conditions.

Advantageous Comparison:

Low-pressure ultraviolet 

Air pressure inside the lamp 0.013MPa 

Monochromatic UV spectral output

Destroys only the DNA of the microorganism 

Single lamp power 14-320W

 Medium Pressure Ultraviolet

Air pressure inside the lamp is equal to atmospheric pressure

Multi-band spectral output

Total disruption of microbial structure

Single lamp power400W-10KW

Removes chloramine and other chemical residual chlorine.

Medium voltage is less affected by ambient temperature

Increased water penetration

  Medium Pressure Ultraviolet

Low-pressure ultraviolet light, because of its single-spectrum output, only has the function of sterilization and disinfection and algae inhibition in swimming pool water treatment applications. Medium-pressure UV is more efficient and thorough in sanitizing and disinfecting, removing urea and chloramines, and protecting swimmers' eyes and skin from pool water irritation; in addition, medium-pressure UV is effective in improving water penetration, making the pool water look clearer.