Challenge
The treatment of drinking water requires the reliable reduction of nitrate and water hardness. At the same time, the aim is to avoid the use of chemical additives and ensure a sustainable solution.

Solution
The CARIX process uses CO₂ to regenerate ion exchange resins, thereby enabling chemical-free water treatment. Piston compressors are used for the necessary CO₂ compression, ensuring a stable and safe gas supply.

The systems employed are designed for continuous operation and ensure reliable integration into the overall process.

Implementation in Germany
A drinking water treatment plant relies on several piston compressors to ensure the CO₂ supply in the process. Two compressors from the TZW 70 series and one compressor from the TEW 90 series are used.

The systems are permanently integrated into the plant and ensure continuous and stable operation.

Results

• Significant reduction in nitrate concentration
• Reduction in water hardness
• Chemical-free regeneration of the resins
• Stable and reliable plant operation