Innovation in Aeration Technology, eco-Bubble

Compact nozzles with DDHRS for

releasing micro-bubbles (S1: 16.3 cm

(H)，S2: 13.3 cm (H)). The micro-

bubble generators equipped with

these compact nozzles are able to

treat 10 to 1,000 L of the water.

The model made up of an acrylic

plastic chamber (S1: 20 L，S2: 10 L)

with a DDHRS nozzle and a magnetic

drive pump. Ambient air or various

gases (oxygen, ozone, carbon

dioxide, hydrogen) are available.

The micro-bubbles (about 15 µm)

released from eco-Bubble®-S. They

look like mist in the water, and are

suspended in the water for a long

time, dissolving gas of the bubbles,

due to extremely low buoyancy．

DO increase curves by the aeration of 22 L of the tap

water in a chamber with pure oxygen gas, using an air

stone (diameter 50 mm) + air pump and eco-Bubble®-S1.

Water temperature: 15.4 to 16.3 ˚C in the air stone and

air pump, 15.5 to 20.8 ˚C in eco-Bubble®-S1.

eco-Bubble®-S1 exhibits remarkably high dissolution capacity of oxygen gas to the water. The DO increase curve by the aeration with an air stone + air pump at the gas flow rate of 2.4 L/min. using pure oxygen gas ( □ ) was totally overlapped with that by eco-Bubble®-S1 at the gas flow rate of only 0.1 L/min. ( ■ ). Approximate 23 hold higher dissolution rate of oxygen gas to the water was noted by the aeration of eco-Bubble®-S1 (50. 1%, temperature: 16.9 to 17.4 ˚C, aeration time: 3’57”) to that by the air stone and air pump (2.2 %, temperature: 16.1 to 16.2 ˚C, aeration time: 3’ 30”) when DO of the water increased from 10 mg/L to 20 mg/L.