How to reduce losses during blueberry sorting

Losses during blueberry sorting are one of the biggest problems in packing houses. Fruit damage, soft fruit, crushing on conveyors, or incorrect sorting cause real financial losses. Fortunately, most of these problems can be reduced through proper process organization and the right sorting technology.

Main causes of losses during blueberry sorting

The most common causes of losses are:

• excessive drop heights between conveyors,
• line speed that is too high,
• sorting fruit at different temperatures,
• lack of quality sorting (e.g. soft fruit),
• too much time between harvest and sorting,
• improper preparation of blueberries for sorting.

Blueberries are very sensitive to mechanical damage. Even a small impact can cause internal damage that is not visible immediately, but after 1–2 days the fruit softens and begins to spoil.

How to reduce losses – practical tips

1. Sort blueberries as soon as possible after harvest

The longer blueberries remain unsorted, the softer they become and the easier they are to damage during sorting.

2. Cool blueberries before sorting

The best sorting temperature for blueberries is approx. 8–12°C. Warm fruit is softer and more susceptible to damage.

3. Reduce drop heights

Each fruit drop should be as small as possible. Modern lines use:

• water unloaders,
• soft slides,
• brushes,
• buffer conveyors.

4. Sort not only by color and size, but also by quality

The biggest losses are caused by soft fruit that ends up in a good batch and spoils it during transport. That is why more and more packing houses use quality sorting, which allows soft fruit and internal defects to be detected.

Such solutions are used in modern sorting lines such as
https://greensort.com/en/products/blueberry-sorter/
where, in addition to sorting by size and color, fruit quality control is also possible.

Summary

The biggest losses in blueberry sorting are not caused by the sorting itself, but by:

• improper fruit preparation,
• excessive temperature,
• lack of internal quality control,
• overly aggressive fruit transport.

A well-designed sorting line and proper work organization can significantly reduce losses and increase the value of sold blueberries.