- A benchtop miniature High Temperature Short Time (HTST) system for the demonstration of the industrial pasteurisation process.
- Includes a transparent feed tank, a feed pump, a three stage heat exchanger, a holding tube, a divert system and a hot water circulator.
- The feed pump is a peristaltic pump, with a variable speed control.
- The heat exchanger is fully representative of large-scale industrial units.
- It uses stainless steel heat transfer plates.
- It can be dismantled for examination and cleaning
- It comprises three stages, a final heating stage, a regeneration stage and a cooling stage.
- Holding time is 15 seconds at 10l/hr, in a stainless steel holding tube.
- Process temperature is measured and controlled.
- Hot water is circulated around the heating stage of the heat exchanger in a closed loop system.
- A PID controller is used to adjust the electric water heater, keeping the product process temperature at the requested value.
- Maximum hot water temperature is 85°C. Normal product process temperature is 72°C; this can be varied by the operator.
- Optional data logger with USB interface is available.
- continuous production process
- pasteurisation of milk, comparison of raw and treated product
- control of pathogenic bacteria, shelf life assessments
- in line logging/data monitoring
- heat transfer
- energy conservation, cost and environmental benefit
- cleaning in place (CIP)
- process control/feedback
- quality assurance/quality control
- links between technology and science
The equipment illustrates a number of major messages associated with food such as ‘Food is a material’ manufactured in a factory and not in a kitchen; ‘Heat kills germs, cold doesn’t’ (including the importance of hygiene); ‘Energy efficient processes keep prices down and protect the environment’.
In addition to pasteurisation, used to demonstrate a wide range of important issues in the field of food technology. These topics can be covered at a simple introductory level and at much more sophisticated levels to suit higher educational needs.