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Ventilation of E&F-Systems

25.11.2015

The ventilation within an ebb-and-flow-system is an important aspect for the operation of the installation. Trough the self-regulated air displacement, when the water reaches the maximum level during the flooding, the oxygen is detracted from the roots. When the pump switches off, gravity pulls the water back down. Thereby the space around the roots is exposed again to the atmospheric pressure, which fills up the openings in the medium.

Belüftung innerhalb eines Ebbe-und-Flut-Systems

The water film, that sticks to the roots during ebb, has a high ratio of surface compared to the mass. This means, that even while the roots are absorbing oxygen, their big surface allows a fresh oxygenation, which supplies the roots with oxygen as long as the surface remains moist. This way the high oxygen content of the water film represses the harmful life-forms by keeping the roots free from diseases.

With other types of hydroponics, the solution has to be cooled to achieve this disease preventing life-form – for example to protect the roots from a Pythium infestation, a type of water mold that is responsible for the condition of ‘water rot’. Here the exterior cells of the roots die off, turn brown and peel off when they are touched. Furthermore, the necessity of extra air supply through pumps does not apply, which increases the reliability of operation and reduces the complexity.

In addition, hydroponic ebb-and-flow systems are very silent and use less electricity than other hydroponic systems. Like that they can be used in surroundings where a high noise development and too many pipes are forbidden, e.g. with only a little space within a classroom or an apartment.

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