Tuber washing is the process of removing soil, stones and field debris from potatoes, beetroot and other root crops using water baths, drum washers or brush washers before further processing or packing.
In trade practice
Wash-water quality is monitored and changed at defined intervals to prevent cross-contamination between batches. Drum speed and brush pressure are set carefully, as aggressive handling causes skin abrasions that accelerate microbial spoilage and shorten shelf life. Processors record water temperature and turbidity as part of HACCP documentation. Stones and clods are separated before washing using destoners to protect equipment and reduce contamination risk.
In a specification
Processing specifications for tuber washing define maximum soil-on-skin residue after washing, water change frequency and the method used to assess skin damage.