Abstract
The aim of this paper is the theoretic and experimental study of the hydrodynamics and mass transfer of the swarm of bubbles generated by fine bubble diffusers (FBD) made from ceramics. Thus the hydrodynamic parameters of the dispersed air-water system (pressure loss on FBD, bubble size distribution, global gas hold up) were experimentally determined. Regarding mass transfer, the volumetric mass transfer coefficient Kla, standard oxygen transfer rate (SOTR) and standard aeration efficiency (SAE) were also determined. The results showed that Kla increases with air flow rate and there is an optimum air flow rate (120 180 l/h) that gives maximum aeration efficiency. The maximum value of SAE (4.25 kgO2/kWh) was obtained for Q = 150 l/h, in homogeneous regime. Comparing the ceramic FBD with a sintered glass FBD issued that an increase of 35% of the mass transfer can be obtained by using glass FBD. Still, SAE accomplished by the two types of FBD tested is in the range given by literature or even greater.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
