Initial situation
Due to its high alkalinity the deep well water of this brewery is treated with cation exchangers. This process creates free, aggressive carbonic acid, which must be removed as some pipelines in the brewery are made of non-durable material and replacement would involve significant investment.
Before installing the EROX® CO2 removal system, the free CO2 was removed by a trickler column. Since this is anopen system, microbiological problems occurred repeatedly which could be maintained only with a good deal of maintenance and cleaning effort to keep the infection under control. Another disadvantage of the open system was that it works without pressure and a pump station was necessary to forward the water to the reservoir downstream. In addition to the additional energy required, the cost of the maintenance was not negligible.
To completely eliminate the disadvantages of an open CO2 stripping column, the brewery decided to install an EROX® membrane system designed for a capacity of 60 m³/h. The investment decision was made on the following characteristic advantages of EUWA solution:
The EROX® membrane system was installed in a single day and fully integrated into the existing control of the entire water treatment plant. Under operation, the following technical / technological key figures are reproducibly achieved:
Natural water contains CO2 either as associated carbonic acid to keep the water in the carbonate balance or in excess as free carbonic acid. If there is excess of carbonic acid, the water is aggressive to piping and systems incorporating mild steel, galvanised steel, copper, or similar materials. Therefore, it is essential to remove the CO2 from the water.
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