Characterization of Microbubbles Generated in a Venturi Tube via Image Processing: Effect of Operating Parameters

Author:

Mera-Campo Jhonnatan StivenORCID,Muñoz-Alegría Jeimmy AdrianaORCID,Flórez-Marulanda Juan FernandoORCID,Muñoz-España ElenaORCID

Abstract

Context: This research developed a dissolved air flotation system using a Venturi tube to produce microbubbles. The Venturi tube replaces the saturation tank and the pressure-reducing valve of conventional systems. Method: The system has both suction and injection air inlets, regulates the recirculation flow of the liquid to the tank, and provides a high hydraulic load in a reduced size. Counting and measuring the microbubbles produced via digital image processing helps to characterize the system's performance. Results: The system with air suction produces smaller bubbles than that with air injection. A higher liquid recirculation pressure produces more bubbles and reduces their size in the case of air suction. Conclusions: In air injection, the change in flow rate influences the size of the microbubbles. Air injection and recirculation pressure do not influence the number of bubbles generated.

Publisher

Universidad Distrital Francisco Jose de Caldas

Subject

General Engineering,Energy Engineering and Power Technology

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