01
What deaeration does
It removes entrained air and some volatiles under vacuum. It can reduce foaming, improve filling and support colour, but it does not sterilize the product or guarantee a shelf life.
02
What heat treatment does
It applies a controlled thermal process to the product. The time/temperature and validation are product-specific. A heat exchanger can foul, and the run length must be assessed.
03
Choose the order
Deaeration may be before or after a preheat step, depending on the product and equipment. The order should be justified by the oxygen-control and thermal process, not by a generic line diagram.
04
Connect to filling
Treated product must be protected until the package is closed. The filler, sterile boundary and package are part of the system. A deaerator or heater alone does not make the product shelf-stable.
| Decision | Deaeration | Heat treatment |
|---|---|---|
| Purpose | Remove entrained air | Apply a validated thermal process |
| Key variables | Vacuum, temperature, residence, foam | Time, temperature, flow, fouling |
| Validation | Air/colour/filling evidence | Product-specific process validation |
| Does not provide | Sterility or shelf life | A sterile package or filling boundary |
Before you enquire
Practical questions
Should deaeration be before or after heating?
It depends on the product and process. Some lines deaerate before heating, some after a preheat. The decision should be supported by product trials and the oxygen-control strategy.
Can heat treatment replace deaeration?
No. They address different issues. Heat treatment may drive off some air, but it is not a designed deaeration step.
Source context. FAO: Fruit-specific preservation, banana puree. Historical description of pulping, air removal, heat exchange and preservation routes. Exact machine selection needs current product trials.
These notes are a project-preparation framework, not a validated operating procedure or a performance guarantee.
Next step
Put the product in the brief.
Share the actual feed, texture target and measurement point. The equipment discussion becomes much more useful.