While low-pressure lamps emit almost exclusively at 254 nm, medium-pressure UV lamps cover a broader spectrum (between around 200 and 300 nm). This spectrum can also oxidise organic compounds and therefore not only inactivate microorganisms, but also break down odours and certain chemical substances.

• Degradation of pollutantsBecause medium-pressure UV-C systems offer a broader spectrum, they are particularly effective at breaking down organic pollutants that can occur in wastewater or industrial effluents.
• Chloramine degradation in swimming poolsMedium-pressure UV is often used in swimming pools to break down chloramines, which are by-products of chlorination and can cause odours and irritate the eyes.

As medium-pressure UV-C lamps have a higher power density, the systems are usually more compact. They require less space than low-pressure systems with a comparable output and are therefore ideal for installations with limited space.

One challenge of medium-pressure UV-C systems is their higher energy consumption compared to low-pressure systems. They require more energy to maintain the higher operating temperature and pressure, which increases operating costs. However, the efficiency in terms of disinfection performance per unit of energy is often justified by the high output.

Nowadays, medium-pressure UV-C lamps have a similar life expectancy to low-pressure lamps. The maintenance effort and lamp changes are therefore also comparable, which can have a positive effect on operating costs due to the higher disinfection performance.

• Industrial waste water treatmentDue to their high performance and ability to break down organic compounds, they are often used in the treatment of industrial wastewater.
• Drinking water treatmentThey are used for the disinfection of drinking water, especially in large systems where a high flow rate is required.
• Swimming pool water treatmentTo reduce chloramines and ensure high water quality.