Analysis of Variations of the Number of Blades and Holes of Paddle Wheel Type Aerator at 120-RPM Rotation Speed

In aquaculture, maintaining water quality and dissolved oxygen (DO) concentration is very important. Aerators have a very important role in increasing dissolved oxygen (DO). But require large operational costs, especially in terms of electric power consumption. This research aims to provide an analysis of the design, prototyping, and experimental of a paddle wheel type aerator to determine the effect, phenomenon, and performance of dissolved oxygen (DO) and the resulting electric power consumption with differences in the number of blades (4, 6 and 8) and the number of holes (12, 16 and 20). The research model chart consists of design, prototyping, and experimental. The results of research with variations in the number of blades and holes can affect the value of dissolved oxygen concentration (DO) and the electric power consumption that will be generated. In the variation of the number of holes, the concentration of dissolved oxygen (DO) produced fluctuates. Meanwhile, the level of electricity consumption produced is inversely proportional to the value of electric power consumption. In the variation of the number of blades, the concentration of dissolved oxygen (DO) produced is directly proportional to the number of blades. While the level of electricity consumption generated is directly proportional to the value of electric power consumption. Aerators with a number of blades of 6 holes 16 and aerators with a number of blades 8 holes 16 are recommendations in the prototype aerators that are effective and efficient in producing an optimal level of DO concentration and saving electric power consumption.