Effect of Throat Size on Performance of Microbubble Generator and Waste Water Treatment

Microbubble can be widely applied to many fields such as waste water treatment fromcommunity, industry and agricultural. This study focus on set up experimental apparatus ofmicrobubble generation to examine the optimum ratio between air to water for generating thebest microbubble by using three different sizes of venturi with throat diameters of 3mm, 4mmand 5mm, respectively; and also for apply microbubble to treat community waste water. Theventuri with throat diameter of 3mm can generate more microbubble than the other. Whenapplied microbubbles to treat the sampling of the waste water, chemical oxygen demand (COD)of waste water was considered.