Mushroom cleaning is the removal of growing substrate, casing material and surface debris from harvested fruiting bodies by brushing, trimming and air jets, a step that directly affects the quality and processing performance of fresh, frozen and dried mushroom products.
In trade practice
Dry cleaning methods such as brushing and compressed air are preferred because mushrooms absorb water rapidly, and excess moisture accelerates spoilage, causes freezing defects and raises the moisture content of dried product above specification. Where water washing is used, it is followed immediately by centrifugal or air drying to restore surface dryness before further processing. Trimming removes the base of the stipe and any discoloured tissue; trim loss is monitored as a yield indicator. Cleaning records and visual inspection results are part of the traceability documentation required by buyers.
In a specification
A mushroom processing specification states the permitted cleaning method, maximum residual substrate level, stipe trim length and the moisture limit that must be met before the product enters the next processing stage.