Controlled Atmosphere Storage (CA Storage) — definition
Storage method that regulates oxygen, carbon dioxide and sometimes humidity levels within a sealed chamber to slow respiration and extend the shelf life of fresh produce.
Controlled atmosphere storage is commonly applied to fruit such as apples and pears, where reduced oxygen and elevated carbon dioxide levels slow ripening and reduce decay compared with standard refrigerated storage. Facilities require gas-tight construction and monitoring systems to maintain precise atmospheric composition over storage periods that can extend to several months.
Why it matters to industrial buyers
Controlled atmosphere storage capacity allows producers to extend marketing windows and reduce post-harvest losses, directly affecting the return on horticultural production investment.
Key reference points
Typical parameter
Oxygen levels are often reduced to around 1-3 percent, well below ambient air's approximately 21 percent.
Construction requirement
Gas-tight rooms are essential to maintain the controlled atmosphere over extended storage periods.
Commonly confused with
Modified atmosphere packaging
Modified atmosphere packaging alters gas composition within sealed retail packaging; controlled atmosphere storage manages it within a whole storage room.
How it is used in practice
The project included controlled atmosphere storage rooms to extend the marketing season for the greenhouse project's fruit output.
Frequently asked questions
Is controlled atmosphere storage suitable for all produce?
No, its benefit varies significantly by commodity, with pome fruit among the most established applications.
How long can product be stored under controlled atmosphere?
It varies by product and variety, but extensions of several months beyond standard refrigerated storage are common for suitable fruit.
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Related terms
Cold Storage Warehouse
Purpose-built facility that maintains chilled or frozen temperatures for stored goods, typically incorporating insulated construction, refrigeration plant and racking designed for low-temperature operation.
Greenhouse Project
Capital investment in a controlled or semi-controlled growing structure equipped with climate management, irrigation and, in advanced installations, supplemental lighting to enable year-round or off-season crop production.
Cold Chain
Continuous sequence of temperature-controlled storage and transport steps that keeps perishable goods within a specified range from production through to final delivery.
Food Processing Plant
Industrial facility where raw agricultural, fisheries or livestock inputs are converted into packaged or bulk food products through mechanical, thermal or chemical processing steps.
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Reference content only. Global B2B Group is independent of equipment manufacturers and financing institutions; definitions are provided for education and do not constitute engineering, financial or legal advice.