Ozone generators ensure the production of safe drinking water.

Drinking water is the most important food of all. Its preparation requires complex processes. To oxidize and disinfect drinking water in the course of treatment, ozone is often mixed in. VEGA’s pressure transmitters make an important contribution to the continuous processing of top quality drinking water.

The water supply system in Baden-Württemberg is one of the largest and most traditionally far-reaching water supplies in Germany. Around 250 cities and municipalities are supplied with about 90 million cubic meters of drinking water each year. 

Plants for the conversion of river water to drinking water consist of a raw water pump which draws the water directly from the river, a pressure pipe from the pumping station to the waterworks and the treatment facilities in the waterworks. In peak times, up to 2,300 litres of river water per second can be converted into drinking water. The injection of highly active oxygen (ozone) for oxidation and disinfection during drinking water treatment represents state-of-the-art technology.

Ozone oxidises dissolved and particulate organic matter and kills or inactivates existing microorganisms. The actual production process takes place in pressurized reactors, where electrical energy is applied to convert oxygen into ozone. Then, the resulting gas mixture flows into an ozone collecting pipe. The maximum ozone concentration is about 180 g/Nm³ at an operating pressure of 1.3 bar. Injectors feed the ozone into the water, while mixers distribute the tiny ozone bubbles evenly throughout the water volume. The water remains for a few minutes in large containers during which time oxidation and disinfection take place.

To ensure that pressure measurement in the ozone collection pipe and at other important measuring points is absolutely safe and reliable, the engineering department decided to use VEGABAR 82, the pressure transmitter with ceramic CERTEC® measuring cell and a “Second Line of Defense”. This is an additional process separation by means a gas-tight feedthrough above the process connection. Although the measuring cell is permanently resistant to ozone, the second line of defense provides an extra layer of protection against the leakage of ozone from the pipeline through the pressure transmitter.

VEGABAR 82 thus plays an important role in safe ozone generation as well as in the continuous production of top-quality drinking water.

VEGA Italia srl
Via Enrico Fermi 8 - 20090 Assago - MI
Tel.: +39 02 8914081 - Fax: +39 02 89140840
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