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.)
Porous resin airstone
Micro-bubble diffuser
eco-Bubble-400®
The time required that DO of the water increases from 0.7 mg/L to 7 mg/L
Device | Porous resin airstone | Micro-bubble diffuser | eco-Bubble®-400 |
---|---|---|---|
Required time | 58' 28'' | 6' 16'' | 1' 58'' |
Dissolution rate of oxygen gas | 1.7 % | 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.