Vinegar is made from sugary and starchy materials by alcoholic and acetic acid fermentation. The common raw materials for vinegar production are sugar cane juice, coconut water or nipa sap. Other fruits and vegetables which can be utilized are pineapples, bananas, potatoes and sweet potatoes.
Vinegar from fresh fruits.
We have a number of fruits which may be used in the preparation of vinegar. Some of them are
pineapples, oranges and bananas. The waste peels and cores from the preparation of fruits preserves
and juices make good starting materials for vinegar making.
Procedures:
Juice preparation. Grind or crush the fruits. Add an equal volume of water to the peels and cores. Boil until soft.
Strain the juice through a cheesecloth. Add one-fourth pound of sugar per liter from peels and cores. It
is not necessary to add sugar to the juice of ripe fruits.
Alcohol fermentation. Add one-fourth cake of fresh yeast, which has been well broken up, for every
liter of juice. Stir very well. Place the juice in earthenware or glass jars and cover with a clean cloth.
Gallon jugs or bottles plugged with cotton may also be used. Let stand for about two weeks.
Vinegar or acetic fermentation. Separate the clear liquid from the sediment when alcohol fermentation has topped. Add one-half of good unpasteurized vinegar or “mother vinegar” , which is the white gummy mass of vinegar bacteria that forms in vinegar. Mix very well. Cover the container
with cloth to protect the liquid from insects and other foreign bodies. Let stand in a warm place until strong enough to use.
Filtration and bottling. Filter the clear liquid. Bottle and cover tightly.
How to make vinegar from potatoes and sweet potatoes:
Crush tubers and heat to dissolve starch. Heating may be either under pressure in a closed retort (long-
necked vessel used in distilling), slowly boiled in water or steamed at atmospheric pressure.
Cool the mixture to 60 degrees centigrade if to be hydrolyzed with malt (germinated grain used in
liquor making).
To prepare malt: Wash ordinary palay (grain of rice). Remove the floating grains. Soak the clean grains in clean water overnight. Place the soaked grains in a shallow container. Cover with sack previously soaked in water and wait for about three days until grains germinate. Sun dry and reserve for future use.
Add two or five per cent of the ground malt to the gelatin mash. Stir chunk mixture until starch is converted into maltose.
To adjust the mixture to 14 degrees brix, add water and sugar.
Add yeast to start the fermentation process.
Bottle the vinegar when fermentation has stopped.
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