Deaerated water is used in the brewing industry for flushing filters, centrifuges, pipes, tanks, etc. When used to adjust the alcohol concentration or original gravity after filtration, residual oxygen concentration of the deaerated water is critical as it directly influences the quality and shelf life of the final product. Bucher Denwel provides a fully automated solution able to economically achieve oxygen down to 5 ppb.

The deaeration column is filled with high efficient structured packing. Its internal surface of 500 m² / m³ ensures a maximal contact area between gas and liquid. Water is homogeneously distributed from the top and CO₂/N₂ is injected at the bottom of the column. While the water flows downwards through the packing, the CO₂/N₂ rises in counter current removing the dissolved oxygen from the water. This process is distinguished by high efficiency and reliability and consumes just a fraction of energy compared to other methods. With hot deaeration water sterilisation is part of the process: the incoming water is heated up to high temperature in order to remove contamination and ensuring high water quality. No further water sterilization is required. An efficient three-zone plate heat exchanger with a large regenerative zone ensures heat recovery rate up to 96%. The unit has an uncompromising sanitary design and is fully CIP cleanable.

Final Oxygen: less than 10 ppb (0,01 ppm)
Pressure: operating 2 to 4 barg, 30 to 60 psig
Temperature: operating 1 to 90 °C, 34 to 194 °F
CIP: 2 to 4 barg, 30 to 60 psig; max. 90 °C, 200 °F
CO2/N2 purity: 99,995%
Stripping gas flow: app. 0,4 g/l (final O₂ and column height
dependent)
Carbonation: app. 0,5 g/l
Connection: Tri-clamp; other connections upon request
Dimensions: from Height 3,5m, 16,4’; Width 1,5m, 4,9’;
Depth 0,5m, 1,6’
Weight: from 300kg, 660 lb
Material: Stainless Steel 304, EPDM, PSU, PP