Ethylene Scrubbers in South Africa

South Africa is one of the world’s major fruit exporters, and its apple, pear, and citrus industries depend on a cold chain and controlled-atmosphere storage that can hold fruit for months and ship it across the world. In the Southern Hemisphere, fruit harvested in the first months of the year supplies Northern Hemisphere markets through their off-season, which makes long, high-quality storage commercially valuable. Ethylene control sits inside that system, and South Africa’s particular conditions, from its cultivars to its power supply, shape how it should be done.

Deciduous Fruit: The Core Use Case

The Western Cape’s deciduous fruit regions, including apple and pear areas in the cooler valleys and highlands, hold large volumes in CA storage for months. Apples and pears are climacteric, and long storage depends on suppressing ripening. Our apple and pear CA storage guide covers the details: CA already suppresses ethylene, but scrubbing keeps concentrations low over a long season, and it works alongside 1-MCP, which many operations use. Cultivar mix matters, since sensitivity varies, and export markets impose their own quality standards on firmness and condition at arrival. A specification should reflect the cultivars and the storage duration that the operation actually plans.

Citrus Is Different, and That’s Worth Understanding

Citrus fruit are non-climacteric, meaning they don’t ripen further after harvest through an ethylene burst, and they generally produce little ethylene. Interestingly, the citrus industry sometimes uses ethylene deliberately in a controlled degreening process to improve rind color for early-season fruit. So an ethylene scrubber is not a general citrus solution. Where citrus is packed and stored alongside other produce, ethylene management matters mainly to protect sensitive products elsewhere in the facility, and the scrubber should not be placed where degreening is being done. Understanding which product is in which room avoids applying the wrong tool.

Power Reliability Is a CA Risk

South Africa’s scheduled power outages, known as load-shedding, are a serious operational consideration for cold stores. CA rooms rely on continuous refrigeration, gas control, and, where used, scrubbers, all of which need power. Ethylene scrubbers that use fans, heaters, or catalytic units stop working when power does, and rooms that lose refrigeration warm up, raising respiration and ethylene production. Well-run stores have generator capacity sized to carry refrigeration, gas control, and air handling, with automatic transfer and restart, and procedures for extended outages. The ethylene system should be included in that backup design, and its restart behavior should be checked so it returns to service safely and in the right sequence.

Long Distance, Long Storage, Long Voyage

Fruit leaving South Africa may be in storage and transit for a very long time: months in CA storage, then weeks at sea. This makes end-to-end control valuable. Reefer containers with CA or ethylene management options, good pre-cooling, and clean starting conditions all contribute. Our export packhouse and reefer guide covers handling along the chain. Exporters benefit from recording temperature and ethylene at key points, which provides data if arrival quality is disputed.

Mixed Handling and Domestic Distribution

Domestic and regional distribution centers handle a broad mix of produce and face the ethylene issues described in our mixed produce distribution guide: separating emitters from sensitive vegetables, isolating ripening rooms, and measuring ethylene rather than guessing. Large urban markets and retail distribution hubs benefit particularly, since waste reduction translates directly to margin.

Water, Energy, and Efficiency

Cold storage is a major energy user, and South African operators face high and rising electricity costs. Good ethylene management supports efficiency, since fruit that stays firm reduces rejects and waste, and scrubbers themselves use modest power compared with refrigeration. Sizing scrubbers correctly avoids waste, and combining scrubbing with efficient refrigeration and tight rooms protects the overall economics. Humidity management in cold rooms is covered in our cold storage dehumidifiers guide.

Coastal and Inland Conditions

Packhouses and stores near the coast face humid, salt-laden air that affects equipment life, while inland facilities may face dust and larger temperature swings. Scrubber housings, fans, and controls should suit the environment, and permanganate media should be stored and handled according to supplier guidance, since moisture can affect it before use.

Maintenance Around the Season

The apple and pear season is intense and short at the front, with storage lasting long afterward. Maintenance should be completed before harvest: checking room seals, testing scrubbers and sensors, replacing media, and confirming backup power. During the season, monitoring ethylene and checking media condition prevents late-season surprises. After the season, servicing and stock-taking prepare for the next cycle.

What to Actually Specify

1. Size scrubbers to cultivar mix, fruit mass, room volume, and planned storage duration.
2. Do not apply scrubbers where citrus degreening is done, and keep the two areas separate.
3. Include the ethylene system in backup power design and verify safe restart.
4. Plan end-to-end handling, including reefer loading and records.
5. Separate emitters and sensitive produce in mixed distribution facilities.
6. Complete maintenance before harvest and monitor ethylene through the season.

Specify the Right Ethylene Scrubber for Your South Africa Operation

Tell us your fruit, cultivars, room sizes, and backup power arrangements, and we’ll help you size ethylene control that fits. Contact us for a free quote.

Related NextAir Solutions in South Africa

Facilities in South Africa working with Ethylene Scrubbers often need more than one of these covered — see our guidance for the same region across our other product lines:

• Dehumidifiers in South Africa
• VOC Adsorbers in South Africa
• Odor Control Adsorbers in South Africa
• Air Purification Systems in South Africa

Frequently Asked Questions