Original construction solutions for two types of fine bubble generators whose nozzles are manufactured by electroerosion are presented. The differential equation of the transfer speed of the oxygen towards water is numerically integrated and theoretical results are presented. A setup for experimental tests regarding the functioning of fine bubble generators was designed and built in the frame of the laboratory. Measurements regarding the increase of the concentration of oxygen dissolved in water were performed. Theoretical and experimental results were compared.
The paper aims to present a procedure of measuring concentration of oxygen dissolved in water; this procedure is based on the electrochemical method. The differential equation of the transfer speed of the oxygen towards water is numerically integrated and theoretical results are presented. A setup used for experimental researches regarding water oxygenation was subsequently developed; measurements regarding the increase of the concentration of oxygen dissolved in water were performed. Theoretical and experimental results were compared.
The paper justifies the need for measuring the concentration of oxygen dissolved in stationary waters; in order to perform accurate measurements, the o xygen probe must be displaced inside water with a speed greater than 0,3 m/s. The performed experimental researches proved the accuracy of probe displacement and the reliability of the driving mechanism. The constructive solution of the driving mechanis m, its functioning and the results of the performed measurements are exposed.
The paper presents a method for computing the oxygen transfer speed in water in non-stationary conditions. The theoretical results are verified by experimental researches performed on a new type of fine bubbles generator; the variation of O2 concentration in water is measured electrically, using an oxygen meter.
For a more efficient oxygenation of free surface stationary waters, the air bubble emitted by a fine bubble generator must describe a trajectory which should be as long as possible. This purpose can be achieved by moving the fine bubble generator through water. In the paper there are determined the equations of motions and trajectory of the air bubble in stationary (still) waters. The paper aims to establish the equation of such a trajectory and the manner in which the speed of the moving generator influences the trajectory of the air bubble displacing itself through water. Using a mobile fine bubble generator we obtained a better water oxygenation.
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