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Aeration of sea water with three different aeration devices at the same air flow rate (1 L/min.)


DO changes of the sea water aerated with pure oxygen gas

(salinity: 31.2, Water temp.: 23.4 to 27.8 ˚C, Water vol.: 400 L, Gas flow rate 1.95 L/min.)

eco-Bubble DO-E1

Porous resin airstone

eco-Bubble DO-E2

Micro-bubble diffuser

eco-Bubble DO-E3

eco-Bubble-400®


The time required that DO of the water increases from 0.7 mg/L to 7 mg/L

DevicePorous resin airstoneMicro-bubble diffusereco-Bubble®-400
Required time58' 28''6' 16''1' 58''
Dissolution rate of oxygen gas1.7 %15.9 %50.4 %

Remarks: The dissolution efficiency of the gas changes markedly depending on the conditions of aeration, in particular

    viscosity and depth of the water.

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