Gas-liquid exchange
Water treatment before use. Dissolved substances

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G1171 V2 Article

Gas-liquid exchange


Water treatment before use. Dissolved substances

Author : Bernard LEGUBE

Publication date: February 10, 2026 | Lire en français

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1. Gas-liquid exchange

1.1 By ventilation

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1.1.1 Simple ventilation

Generally used as the first step in the treatment process, it is necessary for all waters lacking dissolved oxygen: groundwater, water from the deep layers (hypolimnion) of eutrophic reservoirs, or water subject to very high levels of organic pollution. It has the following effects:

  • introduce dissolved oxygen, which promotes the physicochemical or biological oxidation of iron, manganese, ammonium, H ...

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