By A. Keith Thompson
The transportation and garage of unpolluted vegetables and fruit is a world operation the place know-how has to be used to make sure that produce reaches the shopper within the absolute best . using managed surroundings garage has nice power to minimize the postharvest use of chemical compounds, keep dietary caliber and organoleptic features and decrease actual losses.
This revised version contains the newest learn to supply a accomplished and up to date evaluate of managed and converted surroundings garage. Chapters evaluation the historical past of the process, the variety of stipulations and applied sciences at present in use for various produce and their influence on flavour, caliber and body structure. furthermore, the impression of pests and illnesses, environmental elements and packaging and points of managed surroundings delivery are thought of intimately in addition to a synthesis of options for quite a lot of plants.
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Extra resources for Controlled atmosphere storage of fruits and vegetables
These include spinning-disc humidiﬁers, where water is forced at high velocity on to a rapidly spinning disc. The water is broken down into tiny droplets, which are fed into the air circulation system of the store. Sonic humidiﬁers utilize energy to detach tiny water droplets from a water surface, which are fed into the store’s air circulation system. Dijkink et al. (2004) described a system that could maintain relative humidity very precisely in 500-l containers. 1% rh using a hollow-ﬁbre membrane contactor that allowed adequate transfer of water vapour between the air in the storage room and a liquid desiccant.
In commercial practice, for long-term CA storage the store temperature is initially reduced to 0 °C for a week or so, whatever the subsequent storage temperature will be. This would clearly not be applicable to fruits and 29 vegetables that can suffer from chilling injury at relatively high temperatures (10–13 °C). Also CA stores are normally designed to a capacity which can be ﬁlled in 1 day, so fruits are loaded directly into store and cooled the same day. In the UK the average CA store size was given as about 100 t, with variations between 50 and 200 t, in Continental Europe about 200 t and in North America about 600 t (Bishop, 1996).
However, Knee (1990) pointed out earlier that ethylene was not normally removed in commercial CA apple stores but CA technology was successful, so there must be an effect of reduced O2 and/or increased CO2 apart from those on ethylene synthesis or ethylene action. Knee also mentioned that laboratory experiments on CA storage commonly use small containers, which are constantly purged with the appropriate gas mixture. This means that ethylene produced by the fruits or vegetables under such conditions is constantly being removed.