PEAI Aeration Unit

AERATION UNIT - PEAI

INNOVATIVE SYSTEMS

The Aeration Unit, "PEAI", allows the study of the oxygen transfer characteristics of diffused air systems and the physical and chemical parameters which influence oxygenation capacity and demonstrates the water aeration process which, mainly, eliminates smell and taste from water.

See general description

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General Description

The Aeration Unit, "PEAI", allows the study of the oxygen transfer characteristics of diffused air systems and the physical and chemical parameters which influence oxygenation capacity and demonstrates the water aeration process which, mainly, eliminates smell and taste from water.

The "PEAI" unit also allows the study of the mixing and agitation processes in order to familiarize the student with the different types of agitators.

The main component of the unit is the central tank where the liquid subjected to study will be poured. An air pump, located underneath the tank, injects air in the tank. The air-injection tube passes previously traverses a device that measures and control the injected air, allowing the control of the volume of air that is allowed into the tank. After the air flow controller, the air is led through a flexible tube to the upper inlet of the tank. There, three different air outlets can be connected, in order to disperse the air in different ways (three type of diffusers are supplied).

On the other hand, there is a stirrer, with variable speed control, in the middle of the tank. The main part of the stirrer is a motor that makes it turn inside the tank. The unit includes different types of agitators of different size.

There is an oxygen meter to measure the oxygen dissolved in the water and a temperature meter.

The tank is made of a transparent material to facilitate the observation of the mixing process. There covers to avoid splashes.

Exercises and guided practices

GUIDED PRACTICAL EXERCISES INCLUDED IN THE MANUAL

  1. Determination of the aeration needs.
  2. Influence of the injected oxygen volume.
  3. Influence of the stirrer turning speed.
  4. Aeration with air injection and agitation.
  5. Influence of the temperature in the process.
  6. Influence of liquid level in the tank.
  7. Influence of the water composition.

MORE PRACTICAL EXERCISES TO BE DONE WITH THE UNIT

  1. Measurement of the absorption coefficient K and the S oxygenation capacity R.
  2. Effects of oxygen transfer under non-steady state conditions.

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