NOZZLE APERTURE VARIATION ON AIR SUCTION

In this project, the polyvinylchloride (PVC) aerator was designed to treat the waste water in a not too big reservoir. The mechanism of wastewater treatment, briefly, based upon the jet flow of liquid from nozzle to throat. Pressure difference of outer aerator and throat gateway consequently made the air flow in the aerator. This air flow combined with the water passing through nozzle would increase the oxygen level of outlet water.

In the experiments, the nozzle diameters were varied as 26, 33 and 38 mm. In addition, the distances from throat to nozzle (0.5, 1, 1.5 and 2.0 cm) were studied to gain the most air volume passing thru the aerator. The highest air velocity was detected when the 26 mm nozzle diameter was used and the suitable distance from throat to nozzle was 1.0 cm.