5. Post Harvest
• formation of brown coloration – after maturation
• quality deterioration and loss of marketability.
• post harvest (increase the shelf life and marketability)
• harvested after 3 weeks.
• Button mushrooms - CAP size is 30-45 mm diameter
• Oyster mushroom - fruiting body becomes curled under edges and well
formed gills.
6. Cleaning of mushroom
• Removing of unwanted straw
• Cleaning of mushroom
• Improve the quality of
mushroom
7. Grading of mushroom
• Important for marketing
• Graded into A, B and C
• According to size, colour and shape
• Good grade mushroom
– Similar varieties characters
– Good mature
– Well shaped
– Well trimmed
– Free from open caps/ disease/
spots/insect injury
– Free from spoilage/ damage by any
cause
8. Pre cooling
• Kept in a plastic bag and stored in
cooling unit
• long distant transport – (speedy
refrigerated transport system)
cartons containing polythene
pouches of mushrooms may be
transported by refrigerated trucks.
•
• short distance markets,
precooled fresh mushrooms are
dispatched in wooden boxes with
sufficient crushed ice in
polypacks.
• local retailer’s markets
mushrooms are packed in
polypouches and despatched by
cycle, cyclerickshaws, auto-
rickshaws etc.
9. Preservation of mushroom
• Canning- preservation
process
• Mushroom pieces- brine,
butter, oil, vinegar.
• Six basic operation-
• Cleaning -
• Blanching – scalding in
boiling water/ steam for short
time. Clean the surface
• can filling
• sterilization
• cooling
• labelling
10. Drying
• Drying at ambient
temperature
• Dehydration
• Eg. Sun drying,
mechanical drying, air
drying, micro-wave oven
14. Individual quick freezing (IQF)
• followed in large industrial
units.
• mushrooms are inspected,
sliced and graded according
to quality.
• After that, blanched and
water cooled mushrooms are
subjected to tunnel freezing
stage.
• At this stage, these are cooled
in a system having temp –
40℃and the core areas of
mushroom pieces acquire a
temp around – 18℃.
• Subsequently, packed in
multi-layer polybags and
stored in a cold storage
having temp –20℃ to –25℃.
15. Vacuum freeze drying (V.F.D.)
• In this process the original shape, quality,
colour size, texture, freshness
• cooling below the freezing point i.e. – 40℃
• moisture present in mushroom is converted
to tiny ice molecules
16. Drying
• preserving mushrooms at
ambient temperatures.
• dehydration processes
• Sun drying, mechanical
drying, air drying, micro-
wave oven drying, etc.
• Among these the microwave
oven drying is the best
method.
• Vacuum drying process is
followed in reduced pressure. In
this process, the produce is
subjected to a vacuum drier in
which steam is present at about
1.0 to 1.5 bar.
• A vacuum pump is used to
reduce pressure inside the
product. The end product is
obtained after completion of
vacuum drying process.
17. Pickling of mushroom
• Mushrooms are fried with
spices and allowed to cool
and filled in bottles
18. • Protect the mushroom during
marketing
• Packed in polythene bag
– 100 %
biodegradable/renewable
– Waste become raw material
22. Antimicrobial compounds from Mushroom
• (Lycoperdon perlatum, Clavaria vermiculris, Marasmius oreades and
Pleurotus pulmonarius)
• phenolic contents - antioxidant nature influenced by ascorbic acid
content.
• therapeutic agents
• Ganoderma - antibacterial activities against Bacillus sp.,
Staphylococcus aureus., Escherichia coli, Klebsiella sp.,
• Pleurotus obstreactus, Lentinus edodes, Agaricus bisporus shown no
inhibitory activity until 48 hours of incubation .
23. Preservation
methods and value
addition for
mushrooms
VALUE ADDITION
• ➢ A lot has been done in the
medical section form mushrooms
• e.g in supplements for patients,
capsule tablets, tea bags for
cancer patients.
• ➢ In the cosmetic industry
• ➢ In domestic consumption as
soups,tea etc
PRESERVATION
➢ FREEZING (2 -4 ֯C
➢ DRYING
- Freeze drying (frozen &
vacuumed)
- Tunnel drying
- Common local driers