The set-up consists of an open water tank with variable speed paddle mixer. Air is supplied to the water from the bottom and mixed in the water by operating stirrer. Speed of the stirrer can be controlled with the help of speed controlled provided in the Panel. Flow of air entering in the water tank is directly metered with the help of Rotameter and can be regulated by means of Valve provided in the set-up. Three air diffusers of different types are provided with the set-up and are interchangeable. Desired diffuser out of three can be easily installed on the air inlet to the water tank. A Temperature Indicator is also provided which gives the direct reading of water temperature.

The present set-up is complete in all respect to demonstrate the oxygen transfer characteristics of diffused air system. A battery powered Dissolved Oxygen Meter accompanies the apparatus which allows to conduct the experiment with ease.

EXPERIMENTATIONS:

• To study the Oxygen Transfer Characteristics of Diffused Air System.

• To study the Physical & Chemical parameters which influence the oxygenation capacity.

• To study the effect of degree of fluid mixing, water temp, gas flow rate, depth of water, diffuser arrangement, and water composition.

UTILITIES REQUIRED:

• Electricity Supply : 1 Phase, 220 V AC.

• Table for set-up support

TECHNICAL DETAILS:

• Water Tank

  • Material : Acrylic

  • Capacity : 25 Ltrs

• Stirrer

  • DC shunt wound Motor, Coupled to a SS Shaft and Impeller   with Thyristor Controlled DC Drive to Vary the speed.

• Air flow measurement

  • Rotameter..

• Air Diffusers

  • Quantity                     :           3 Nos.

    • Sparger 

    • Treble Airstone

    • Single Airstone.

• DO Meter 

  • 0-100% saturation

  • With standard make On/off switch, Mains Indicator etc.

• The whole set-up is mounted on a powder coated base plate.