The Volume of the Product of Backward Water Splash Based on Submerged Blade Depth of Paddlewheel Aerator

Abstract

The paddlewheel is a common used aeration equipment. In term of aeration mechanism and driving force, it is very good to be used. However, the paddlewheel has a slow aeration rate resulting in low aeration efficiency. One of the causes is the splash of the backward water of the paddlewheel that is already aerated, but it is splashed again so it wastes the power. The aim of this study was to determine the volume of the backward water splash production. The paddlewheel used a 1 phase motor, 1 hp power, 1400 rpm motor speed, and 2 pieces of wheels. The treatment was carried out by varying the blade of 65,85, and 105mm submerged. The test was done by collecting the backward water splash and calculating its volume. The results showed that the volume per hour of backward water splash at the blade submerged in the 65, 85, and 105mm were 10.68, 13.74, and 15.27 m3, respectively. The average of forward splash volume of water was 58.04%, while the backward was 41.96%. The results of this study indicated that the volume of backward water splash is very significant to be utilized.