Saturday, 25 February 2012

Vegetables preservation for income generation, food security & climate adaptation in Kenya

 Fresh vegetables are highly perishable and their drying is essential for increased shelf life and value addition; particularly in the face of frequent droughts and climate change in Kenya and globally.This can be accomplished by using solar driers in Africa.
               
CHART FOR VEGETABLES PRESERVATION  BY Solar  DRYING
Vegetables
Selection and preparation
Method of Treatment Before Drying
Treatment time in minutes
Test for dryness
during preservation
Cabbage
Remove outer leaves, quarter and core. Cut into shreds 3mm thick
Steam
5 to 6 ; until wilted
Tough to brittle
Carrots
Select crisp tender carrots Clean, cut off tops and roots. Cut into slices or strips about 3mm thick.
Steam
8 to 10
Tough to leathery
Potatoes
Peel, cut into strips 5mm in cross section or cut into slices 3mm thick
Rinse  in cold water; steam
4 to 6
Brittle
Green Vegetables
Select young tender leaves for preservation. Wash. Cut large leaves into pieces crosswise.
Steam
4 to 5; until wilted
Brittle
Banana
Wash, peel slice into strips 5mm thick
Steam
6
Tough ; brittle
Pumpkin
Chop into strips 2.5cm peel, remove fibre and seeds. Cut into strips 3mm thick
steam
Until tender
Tough ; brittle
Scallop, Zucchini or courgettes or summer/winter squash
Wash, trim and cut into 5mm slices
Steam
6
Brittle
Tomatoes for stewing
Dip in boiling water, chill in cold water, peel, cut into sections 15mm thick
No further treatment
10 to 20
Leathery
Green Peas
Select young tender peas, shell.
Steam immediately
10
Hard, wrinkled, shatters when hit.
Beans; green pods
Sort, wash, remove strings, and split pods lengthwise.
Steam or
Pressure cook
15 to 20
5
Brittle
Broccoli
Trim and cut as for serving. Wash, cut stalks into quarters lengthwise.
Steam
8 to 10
Brittle
Sweet corn
Select tender sweet corn. Husk steam on cob immediately 10 to 15 minutes or until milk is set. Detach grains from cob.
Steam; no further treatment required
30
Dry ; brittle
Beet roots
Select small tender beets. Wash; trim the tops leaving the crowns. steam , cool, trim off roots and crowns; peel, cut into shoestring  strips or slices 3mm thick
Steam as suggested before preservation
30 to 45
Tough; leathery
Onions
Remove outer discolored layers. Slice.
No treatment

Brittle, pale
Leaves for seasoning like; coriander, parsley and celery preservation.
Remove discolored leaves
wash for preservation
Till clean 
Brittle
Powdered vegetables: grind leafy vegetables into powder after preservation, for use in soups and puree
Soup mixtures: preservation by drying is done according to directions for individual vegetables. Mix and store satisfactory combinations which may be made from cabbage, carrots, celery, corn, onions and peas. However rice, dry beans, split peas and meat stock are added at the time of cooking.

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