General Description

The Computer Controlled Adsorption Unit, "PEAC", demonstrates the removal of substances dissolved by adsorption.

A computer controlled pump impels raw water (treated) from a supply tank to two adsorbers filled with activated carbon. A flow sensor allows to know the water flow rate impelled by the pump.

The supply tank includes a computer controlled heating element, with PID control, to study the influence of raw water temperature in the adsorption process.

There is a level sensor in the tank to control the water level.

Before entering the first adsorber, through a computer controlled peristaltic pump, a concentrated adsorbate solution available in an other tank is added to the raw water (treated). Thus, the concentration of adsorbate can be varied.

This water descends through the first adsorber, entering in contact with the activated carbon bed. A second adsorber is included for better adsorption.

Adsorbers include sampling points to analyze the concentration of adsorbate.

The circuit includes a series of valves to vary the contact time between raw water and activated carbon.

When clean water leaves the adsorbers it may be collected for its analysis in open circuit or returned to the supply tank in closed circuit.

This Computer Controlled Unit is supplied with the EDIBON Computer Control System (SCADA), and includes: The unit itself + a Control Interface Box + a Data Acquisition Board + Computer Control, Data Acquisition and Data Management Software Packages, for controlling the process and all parameters involved in the process.

Exercises and guided practices


  1. Study and analysis of the adsorption process of substances dissolved in activated carbon.
  2. Influence of raw water temperature in the adsorption process.
  3. Influence of the contact time between raw water and adsorbent in the adsorption process.
  4. Influence of the operation mode in the adsorption process.
  5. Influence of adsorbate concentration in the adsorption process.
  6. Efficiency of an adsorber.
  7. Mass balance of an adsorber.
  8. Representation of concentration profiles and rupture curves.
  9. Relationship between concentration profiles and rupture curves.
  10. Study of the mass transfer zone.
  11. Sensors calibration.


  1. Many students view results simultaneously. To view all results in real time in the classroom by means of a projector or an electronic whiteboard.
  2. Open Control, Multicontrol and Real Time Control. This unit allows intrinsically and/or extrinsically to change the span, gains, proportional, integral, derivate parameters, etc, in real time.
  3. The Computer Control System with SCADA and PID Control allow a real industrial simulation.
  4. This unit is totally safe as uses mechanical, electrical and electronic, and software safety devices.
  5. This unit can be used for doing applied research.
  6. This unit can be used for giving training courses to Industries even to other Technical Education Institutions.
  7. Control of the PEAC unit process through the control interfacebox without the computer.
  8. Visualization of all the sensors values used in the PEAC unitprocess.
  9. By using PLC-PI additional 19 more exercises can be done.
  10. Several other exercises can be done and designed by the user.



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