[Characterization of bubble size distribution in ES-DAF unit].
ES-DAF unit was introduced and studied in this paper. Without a costly air saturator, ES-DAF consists of an ejector and a static mixer between the pressure side and suction side of the recycle rotary pump. The bubble size distribution in this novel unit was studied by using a CCD imagination through a microscope. The bubble size decreased with the increase of cycle ratio or the decrease of superficial air-water ratio. These results suggest that smaller bubbles would be formed when the initial number of nucleation sites increase by enhancing the turbulence intensity in the saturation system. The bubble size distribution became lower and wider with the increase of saturation pressure because of more frequent bubble collision and coalescence.
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Fu-tai
FT
Chen
Hua
H
Zuo
Jiu-yi
JY
Li
Zheng-hong
ZH
Fan
Zhao-kun
ZK
Luan
D000388:Air; D005740:Gases; D010316:Particle Size; D011312:Pressure; D013500:Surface Tension; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*; D014872:Water Movements; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*
D005740:Gases