The requirements for the shelf lives of beverages have been constantly tightened up over recent years. The removal of oxygen is an essential element in meeting these demands. GEA offers just the right technical solution, depending on the limit value required and the nature of any further processing with its DIOX™ units.
GEA offers various types of the water deaeration system type DIOX™. If single-stage or two-stage vacuum deaeration is to be applied, we recommend the DIOX-1™ or DIOX-2™. In case membrane deaeration is the best way the DIOX-M™ is available.
The water deaeration system DIOX-1™ can be easily integrated into existing systems.
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.
The GEA water deaerator type DIOX-M™ is based on a system of membrane modules and permits an optimum water deaeration at low operating expenses.
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).
The water deaeration system DIOX-2™ can be easily integrated into existing systems.
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.