Drinking water treatment using the CARIX process
Application | CO2 compression
Country | Germany

The CARIX® process for drinking water treatment is an innovative ion exchange process that enables effective water softening using special resins. In this process, the loaded resins are regenerated purely with CO(deep:2) - completely free of chemical additives. In order to sustainably reduce water hardness for the population, the municipality of Weingarten has opted for the tried-and-tested CARIX® process and integrated three compressors from Mehrer Compression GmbH for the centrepiece of its system.
Two TZW 70 series reciprocating compressors and a TEW 90 series reciprocating compressor are used for this purpose. This modern technology has made it possible to reduce the nitrate concentration in the drinking water from 53 mg/l to around 32 mg/l. In addition, the water hardness has been reduced from 53 °dH (German hardness level) to 13 °dH. In addition, the water hardness was reduced from 24 °dH (German degree of hardness) to 13 °dH - a significant improvement in the region's drinking water quality.
Series | TEW 90 |
Description | 1-stage, double-acting |
Suction pressure | 1,4 bar(a) |
Final pressure | 26 bar(a) |
Volume flow | 100 am3/h |
Gas state | 100% Water vapour saturated |
Compressor cooling | Water-cooled |
Series | TZW 70 |
Description | 2-stage, double-acting |
Suction pressure | 1 bar(a) |
Final pressure | 11 bar(a) |
Volume flow | 350 kg/h |
Gas state | 100% Water vapour saturated |
Compressor cooling | Water-cooled |