March 28, 2014

Fresh fruit and vegetable storage technology

First, the processFresh fruits and vegetables cleaning ??surface sterilization detoxification rinsing ??film StorageSecond, the process pointsl, choose fresh raw materials should be selected fresh ( preferably eight mature ) no rot , no serious pests, no damage fruit and vegetable products , after picking the need for sterilization, preservation treatment immediately , minimizing handling and preservation after picking between storage time .2 , after picking the fruits into a clean washing water and the amount of cleaning liquid detergent formulation , washed surfaces of various soil, dirt and other eggs .3 , sterilization detoxification ( Choose one of two ways )( 1 ) the use of potassium permanganate solution sterilization detoxification.The specific method is: clean fruits and vegetables release potassium permanganate solution, 0.1% -0.2 % of the soak 1 to 3 minutes .( 2 ) the use of peracetic acid sterilization.When using the liquid to be sterilized and then added to 3 to 4 -fold diluted with water , and potassium permanganate solution using the same method ( Note : this method sterilized vegetable rinsing step can be removed ) .In addition, ozone can also be used as a mechanism of ozone water disinfection .4 , immediately after sterilization detoxification rinse fruits and vegetables into clean tap water rinse , wash the surface residual sterilizing liquid , remove and put on a reed mat , drain surface water plastic package in the shade.5 , to dip coating , spray coating or other means to advance preparation of a good film preservation solution evenly attached to the surface of fruits and vegetables , coated on immediately after the reed mat or mats, dry surface in a cool environment, that in the fruit and vegetable surface layer of transparent , semi- permeable preservation of film formation .6, the storage conditions( 1 ) selection of ventilation dark, no rodent room.( 2 ) a room or cellar walls before use with 1.5% solution of bleach spray sterilization. Can also be sprayed with 0.3% peracetic acid bacteria . In addition, fruits and vegetables during storage , storage room on a regular basis for sterilization . Sterilizing solution can be used potassium permanganate solution or bleach solution .( 3 ) Storage sprinkle with ground lime .( 4 ) for the production of the corresponding quantity of fruits and vegetables stacked in a storeroom in flower . Fruit baskets can also be stacked directly or breathable bag after code on flower stand.( 5 ) In order to release ethylene gas from fruits and vegetables to remove oxidation , can be used both methods ( Choose one ) , one oxidant law: the upcoming preparation of a good oxidation preservative, 5 grams per kilogram of fruit and vegetable preservative ( dry basis ) proportion in full bloom in plastic or porcelain container, placed in the bottom evenly distributed storage room or cellar . Second, ozone oxidation method machine : that is, in the upper part of the room or cellar to install an ozone machine, requires an ozone concentration of 6 mg per cubic meter ( Note: When ozone concentrations exceed 2 mg / per cubic meter , the people for a long time packaging company indoor breathing plastic case harmful, clear plastic box paying particular attention to the operation ) , ozone machine models depending on room size. Ozone machine boot time is 2-3 hours a day .( 6 ) In order to prevent the surface of the storage of fruits and vegetables " sweat " , a regular window ventilation 1 to 2 hours , summer ventilation timing night, winter and select noon.( 7 ) floor storage compartment in the soil as well, so to maintain high relative humidity (typically fruit and vegetable requirements humidity 80-95 % RH Storage citrus fruit smaller, hygrometer detects availability ) , or only by artificial water, time-consuming and laborious.Third, pay attention1 Storage generally used just after picking , maturity is about eight mature fruits and vegetables (in late-maturing varieties as well ) .2 , fresh fruits and vegetables be the most suitable autumn , the best storage environment for the cellar , storage temperature is 0 ~ 15 appropriate, pears, peaches , plums, grapes, strawberries , garlic sprouts optimum temperature 0 ~ 5 , green peppers , green tomatoes, cucumber optimum temperature is about 8 .3 , fruit and vegetable storage should be selected 4-5 in the morning , performed at low temperature, the surface of fruits and vegetables " sweat " phenomenon after storage case .4, using the technology of the time be fresh leafy vegetables , in addition to selection of the coatingPreservation solution , but can also be purchased directly preservation of ozone preservation machine better.5 , plastics products the coating liquid ingredients vac tray except fresh herbs are selected outside food clear plastic packaging additives, industrial products other optional ingredients .6 , fresh fruits and vegetables should regularly during the visual inspection , such as fruits and vegetables found to have softened the phenomenon of aging , it is timely sale of the library , there are some mildew should be promptly removed.7 , high concentrations of acetic acid and hydrogen peroxide ( also known as hydrogen peroxide ) is corrosive liquid formulation of peracetic acid sterilization should pay attention to safety , and diluted with a plastic container full bloom ; while saving sealed storage in a cool dark place , valid for six months.

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