Water Deaeration Systems DIOX™

Oxygen in soft drinks affects the preservability and the taste. Therefore, it is important to use deaerated water for the production of soft drinks. The GEA 1-stage water deaerating system, type DIOX-1™, achieves a good value of residual oxygen and is thus especially suitable for these and some further applications.

The water, which should be deaerated, is transferred finely spread through a spray nozzle into the tank, which is under a high vacuum. With it the largest part of oxygen is extracted. A vacuum pump made of stainless steel keeps up the vacuum. Alternatively, the supplied water can be mixed with CO2 before the deaeration to get a better result. CO₂ increases the release of oxygen. A discharge pump feeds the deaerated water to the consumer.

The system is cleaned via the product path. In addition, an optimum cleaning effect is obtained by a spray ball in the deaerating tank.

• Low residual oxygen content: <1.0 mg/l (1 ppm)
• Optional: <0.7 mg/l (700 ppb) 
• Very low or even no CO2 consumption
• Low operating costs
• Short installation time (the unit is pre-assembled)
• Low maintenance costs
• Can be supplied for flow rates of between 50 and 600 hl/h

• Water admission pressure: 3.5 bar
  
• Water temperature: >10°C
• Control air pressure: 6 - 8 bar
• Materials: 1.4301 / EPDM
• CO₂ admission pressure: 6 - 8 bar
• CO₂ consumption: 0 - 0.5 g/l
• CO₂ quality: >99.99 % purity

Depending on the number of utilized modules, the vacuum applied, and the quantity of stripped gas (N2 or CO2), a residual oxygen value of ≤ 0.01 mg O2/l in water can be obtained. 

The modules are mainly consisting of a large number of microporous polypropylene fibres which are surrounded by the product to be deaerated. The pores in the hollow fibres are only permeable for gas which is sucked off by means of a vacuum pump. The oxygen output can be improved by feeding the fibres with carbon dioxide or nitrogen. On each step, the oxygen can be reduced to less than 1/10 of its initial value. 

The modules are enclosed in stainless steel housings. The utilized material allows the modules to be cleaned with hot water or caustic solution (without any additives). 

• Low residual oxygen content: <0.01 mg/l (10 ppb)
• Need for small floor space only
• Low or even no CO2 consumption
• Low operating costs
• Short installation time (unit is pre-assembled)
• Low maintenance costs
• Can be supplied for flow rates of between 50 and 400 hl/h

• Water admission pressure: ≤7 bar if <40°C
• CIP admission pressure: ≤2.3 bar
• Water temperature: >10°C
• Control air pressure: 6 - 8 bar
• Materials: 1.4301 / EPDM
• Material of the hollow fibres: Polypropylene
• CO₂ admission pressure: 6 - 8 bar
• CO₂ consumption: 0 - 0.4 g/l
• CO₂ quality: >99.99% purity

Oxygen in beer or soft drinks affects the preservability and the taste. Therefore, it is important to use optimally deaerated water for the production of soft drinks and the adjustment of original wort or alcohol content, respectively.

GEA 2-stage water deaerating system, type DIOX-2™, achieves an excellent value of residual oxygen and is thus especially suitable for these and some further applications. 

In the first stage the largest part of oxygen is extracted by pure vacuum deaeration. Being mixed with CO2, the pre-deaerated water is carried into the second stage. CO2 increases the release of oxygen. The CO2-oxygen mixture is also sucked off by the aid of the vacuum pump (P3) via tank B1 in the reverse flow direction of the spray jet, thus increasing the deaerating effect of the first stage. By a discharge pump (P2) the deaerated water is carried to the consumer. 

The sealing water consumption is minimized by the integrated temperature control. Detectors for pressure, level, and possibly oxygen monitor the system for its proper function. 

The system is cleaned via the product path.

• Low residual oxygen content: <0.2 mg/l (200 ppb)
• Optional: <0.05 mg/l (50 ppb)
• Low CO2 consumption
• Low operating costs
• Short installation time (the unit is pre-assembled)
• Low maintenance costs
• Can be supplied for flow rates of between 50 and 900 hl/h

• Water admission pressure: 3.5 bar
• Control air pressure: 6 - 8 bar
• Materials: 1.4301 / EPDM
• CO₂ admission pressure: 6 - 8 bar
• CO₂ consumption: 0 - 0.5 g/l
• CO₂ quality: >99.99 % purity