Below is a list of frequently asked questions. Should you not find your answer, please do not hesitate to post your question via the contact form, or contact one of our offices.

  • Will fruit quality improve with Controlled Atmosphere?

No. However, if Controlled Atmosphere is applied as it should, following scientifically established protocols, it minimizes quality loss to almost zero.

  • Can all types of fruit and vegetables be stored in Controlled Atmosphere?

A lot of fruit types can be stored 2 or 3 times longer in CA. Best known are apple, pears, tomatoes, mango, pineapple, citrus, kiwi, berries and cherries. We have experience with many other fruit types also, so just let us know what you want to store.

  • Why is relative humidity important for fruit storage?

Weight loss (loss of quality and values) during storage is caused by moisture loss (which is a result of transpiration and evaporation). Transpiration causes relative humidity in CA stores to increase to > 90%. Relative humidity is decreased during and directly after every cooling action. Therefore the sizes and the settings of a cooling system are key to avoid moisture loss.

  • Is Controlled Atmosphere a chemical treatment?

No. Controlled atmosphere (CA) is a “clean” technology not using any chemicals. For this reason there is no health risk involved in consuming CA-stored products.
Particularly, in the storage of organic (biological) products, this is the only available storage method.

  • Is every cold store ready for Controlled Atmosphere?

Controlled Atmosphere can only be applied in gastight rooms. Depending on the gas conditions applied, gas tightness should be 0.5 - 3 cm2 total aperture per 100m3 volume of a store.

  • Why may it be important to remove ethylene?

Ethylene is a hormone produced by fruit, which is able to start and accelerate maturity. Maturity means (amongst others) softening, production of sugar and aromatics, color change and de-greening the chlorophyll. Removal of ethylene by catalytic converters can be useful. However, in Controlled Atmosphere conditions, the removal of ethylene does not have an additional effect for the majority of fruits and veggies. There are exceptions to this rule, like the long-term storage of kiwi or kaki (persimmon).

  • Why should kiwifruit be kept away from ethylene?

Although Kiwi produces low levels of ethylene, they are extremely sensitive towards it. For this reason, it is important that the partial pressure (“concentration”) of ethylene during storage does not exceed 0.02 ppm. Higher values cause rapid maturation and senescence. For this reason, kiwi should never be stored together with other fruits (e.g. apple).

  • Why is Van Amerongen the best partner in CA / ULO storage?

Van Amerongen offers over 40 years of global experience in Controlled Atmosphere. VA has a network of offices, agencies, distributors and agents which offer customers the best possible service.
Van Amerongen designs and manufactures all machinery, equipment and accessories in its own factory in Tiel, Holland.

  • Is service possible all over the world?

Off course! Van Amerongen is proud to have customers in 55 countries on all continents. Service is provided by our world-comprising network of distributors and agents, and by our 6 offices in Holland, India, Chile, Poland, Portugal and Turkey.

  • Is Van Amerongen involved in research?

Van Amerongen closely collaborates with leading national and international research institutes in order to develop innovative technologies. Van Amerongen has a R&D department and works together with a network of companies.


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