1.- Setting up; filling of the circuit of water.
2.- Set up of the pasteurization plant; operation with water.
3.- Determination of the relation between the heating water temperature in function

of the liquid flow to pasteurize.
4.- Determination of the survival curve for the different bacterial floras.
5.- Determination of the threshold temperature for a constant warning time of the milk.

6.- Determination of the necessary time to obtain a desired sterility volume.
7.- Determination of the thermal reduction time curve.

8.- Cleaning of the unit with sodium hydroxide.
9.- Cleaning of the unit with nitric acid.
10.- Manual cleaning of the heat exchanger.
Other possible practices:
11.- Sensors calibration.
12.- Method for direct count with a Microscope.
13.- Method for direct count in Agar plates.
14-32.- Practices with PLC

1. PADC. Unit:

Metallic structure. Pasteurization capacity: 250 l./h. Water flow in the exchange section: 750 l./h. Thermal Cycle: 4-56-72-20 ºC. Retention time: 20 seconds at 250 l./h. of milk. Water temperature in the heating section: 79ºC. Plates in the
regeneration section: 17. Plates in the pasteurization process: 9. Start tank. Heat exchanger. Milk pump, computer controlled. Water pump, computer controlled. Water tank with heating element, computer controlled. Retention milk tank.
Expansion water tank. Water temperature sensor. Milk temperature sensor. Milk inlet valve. On/Off valves. Defective valve 250/500 l. Water fill valve. Purge valve. Safety valve. Pneumatic valve.

2. PADC/CIB.Control Interface Box:

With process diagram in the front panel. The unit control elements are permanently computer controlled. Simultaneous visualization in the PC of all parameters involved in the process. Calibration of all sensors involved in the process. Real time curves representation. All the actuators’ values can be changed at any time from the keyboard. Shield and filtered signals to avoid external interferences. Real time PID control with flexibility of modifications from the PC keyboard of the PID parameters, at any moment during the process. Open control allowing modifications, at any moment and in real time, of parameters involved in the process. 3 safety levels: mechanical in the unit, electronic in the control interface, and the third
one in the control software.

3. DAB. Data Acquisition Board:

PCI Express Data acquisition National Instruments board to be placed in a computer slot. 16 Analog inputs. Sampling rate up to: 250 KS/s. 2 Analog outputs. 24 Digital Inputs/Outputs.

4. PADC/CCSOF.PID Computer Control+Data Acquisition+Data Management Software: 

Flexible, open and multicontrol software. Management, processing, comparison and storage of data. Sampling velocity up to 250 KS/s (kilo samples per second). It allows the registration of the alarms state and the graphic representation in realtime.

5. Cables and Accessories: 

 for normal operation

6. Manuals:

This unit is supplied with 8 manuals.
Dimensions (approx.)= Unit: x 850 x 1550 mm. Weight: 120 Kg. 1250 Control Interface Box: 490 x 330 x 310 mm. Weight: 10 Kg.