Drinking water treatment using the CARIX process

Solution | Piston compressor
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
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