Determination of the Optimal Parameters of the Jet Aeration

Abstract

To ensure effective aeration of the biological wastewater treatment process, easy-to-operate and not too energy-intensive units are needed. Jet aerators have such capabilities. In this study, the authors searched for the best hole shape for the aeration nozzles. It was determined that a nozzle with an elongated hole has the largest size of the actively aerated zone. Experimental studies of nozzles of a diameter of 56 mm with nozzles of elongated shape showed that the best characteristics of mass transfer are provided by nozzles with a total area of holes of 356 mm2 at a flow rate of 10 … 12 m/s. For practical calculations, an equation was obtained for the dependence of the oxygen transfer coefficient KLa(20) on the complex criterion vn, and a method for calculating aeration units was developed, which is applicable for aerators with elongated holes.

Economic Design of Pipe-Nozzle Discharge Lines Delivering Free Jets

“…In the case of an approach pipe ending with a nozzle, Figure 1, which has a known assumed loss coefficient, the head loss as associated with the high issuing velocity head and is therefore not as minor loss. But, in the present study, it is suggested that the minor loss of the nozzle may be expressed in terms of the equivalent length of approach pipe (Le), that has the same head loss for the same discharge delivered from the nozzle De Cock (2017), Radkevich et al (2021) Where F = friction factor of approach pipe, Le = equivalent length of pipe, VP = velocity of flow in approach pipe, D = diameter of approach pipe, g = acceleration of gravity, K = loss coefficient of minor loss due to nozzle, VJ = absolute velocity of the jet, and d = diameter of nozzle opening (diameter of jet).…”

Analytical Investigation of the Impact of Jet Geometry on Aeration Effectiveness Using Soft Computing Techniques

“…To ensure that the biological wastewater treatment process is effectively aerated, simple basic units are needed. Jet aerators provide these characteristics . Also, compared to conventional systems, the oxygen exchange mechanism using a sputtering jet of water is a better way to add oxygen to a pool of water .…”

“…Jet aerators provide these characteristics. 12 Also, compared to conventional systems, the oxygen exchange mechanism using a sputtering jet of water is a better way to add oxygen to a pool of water. 13 Additional uses include cell bioreactor, oxygenation, and mineral-processing flotation cells.…”