225,346 Fetkenheue Jul. 31, 1985
Modified atmosphere packaging technology for the preservation of freshly extracted fruit juices and juice blends has not been reported. Modified atmosphere packag¬ ing technology has been applied to fruits and vegetables where the cells remain intact and continue to respire. Modified atmosphere packaging technology also usually employs gases with low to moderate levels of carbon diox¬ ide, or none at all.
SUMMARY OF THE INVENTION
The invention pertains to a process for preserv¬ ing fresh fruit juice which comprises sanitizing the outer surface of a fruit, extracting juice from the edible portion of the fruit, at which time the cell walls are broken or disrupted, gasifying the juice with an oxygen containing, carbon dioxide-containing gas mixture, placing the juice in a high gas barrier container to a level which retains a headspace of about 1 to 10% of the total liquid volume, hermetically sealing the container and rapidly cooling the juice in the container to about -1°C to 2°C.
Alternatively, gasification of a juice or juice blend may take place when the product is in the container.
The fruit juice can be a citrus fruit juice, a tropical fruit juice, or any other fruit juice, or a combi¬ nation thereof and the headspace volume can be about 1% to 10%. Preferably, the headspace volume can be about 3% to 7%.
The invention also pertains to a process for preserving fresh fruit juice which comprises: (a) intro¬ ducing an oxygen-containing, carbon dioxide-containing gas mixture into the juice by bubble-streaming to bring about a predetermined level of gas saturation of the juice for each of the gases in the dissolved state; (b) packaging the gas-treated juice in a high gas-barrier container to prevent air entry into the container and outflow of gas within the containers; and (c) rapidly cooling the juice in the container for cold shocking of the juice.
Alternatively, gasification of a juice or juice blend may take place when the product is in the container.
The invention is also directed to a process for preserving juice obtained from fresh fruit which comprises: (a) sanitizing the outer surface of a fruit from which the fruit is to be derived; (b) extracting juice from the edible portion of the fruit, at which time all of the cells are broken or disrupted; (c) gasifying the juice with an oxygen-containing, carbon dioxide-containing gas mixture to bring about a specific level of gas saturation of the juice for each gas in its dissolved state; (d) filling a container with the juice so that a headspace volume of about 1% to about 10% of total liquid volume exists in the container; and (e) cold shocking the juice in the con¬ tainer by rapidly cooling the container and juice to a temperature of about -1°C to 2°C.
The headspace volume can preferably be about 3% to 7% and the fruit can be sanitized with a sanitizing agent, which can be selected from the group consisting of chlorine, peroxide, bleach and an oxidizing agent. The sanitizing agent can be chlorine in water.
The invention relates to a process for preserving fresh fruit juice which comprises: (a) sanitizing the outer
surface of a fruit from which juice is to be extracted with a sanitizing agent to inactivate spoilage organisms; (b) extracting juice from the edible portion of the fruit; (c) gasifying the juice at about 5°C to 20°C by bubble stream- ing an oxygen-containing, carbon dioxide-containing gas mixture through the juice; (d) filling a high gas barrier container with the juice to a level to attain a headspace volume of about 3 to 7% of the total juice volume; (e) hermetically sealing the container; and (f) rapidly cooling the juice in a container to a temperature between about - 1°C and 2°C with a minimum hold time of about 12 to 24 hours.
225,346 Fetkenheue Jul. 31, 1985Modified atmosphere packaging technology for the preservation of freshly extracted fruit juices and juice blends has not been reported. Modified atmosphere packag¬ ing technology has been applied to fruits and vegetables where the cells remain intact and continue to respire. Modified atmosphere packaging technology also usually employs gases with low to moderate levels of carbon diox¬ ide, or none at all.SUMMARY OF THE INVENTIONThe invention pertains to a process for preserv¬ ing fresh fruit juice which comprises sanitizing the outer surface of a fruit, extracting juice from the edible portion of the fruit, at which time the cell walls are broken or disrupted, gasifying the juice with an oxygen containing, carbon dioxide-containing gas mixture, placing the juice in a high gas barrier container to a level which retains a headspace of about 1 to 10% of the total liquid volume, hermetically sealing the container and rapidly cooling the juice in the container to about -1°C to 2°C.Alternatively, gasification of a juice or juice blend may take place when the product is in the container.The fruit juice can be a citrus fruit juice, a tropical fruit juice, or any other fruit juice, or a combi¬ nation thereof and the headspace volume can be about 1% to 10%. Preferably, the headspace volume can be about 3% to 7%. The invention also pertains to a process for preserving fresh fruit juice which comprises: (a) intro¬ ducing an oxygen-containing, carbon dioxide-containing gas mixture into the juice by bubble-streaming to bring about a predetermined level of gas saturation of the juice for each of the gases in the dissolved state; (b) packaging the gas-treated juice in a high gas-barrier container to prevent air entry into the container and outflow of gas within the containers; and (c) rapidly cooling the juice in the container for cold shocking of the juice.Alternatively, gasification of a juice or juice blend may take place when the product is in the container.The invention is also directed to a process for preserving juice obtained from fresh fruit which comprises: (a) sanitizing the outer surface of a fruit from which the fruit is to be derived; (b) extracting juice from the edible portion of the fruit, at which time all of the cells are broken or disrupted; (c) gasifying the juice with an oxygen-containing, carbon dioxide-containing gas mixture to bring about a specific level of gas saturation of the juice for each gas in its dissolved state; (d) filling a container with the juice so that a headspace volume of about 1% to about 10% of total liquid volume exists in the container; and (e) cold shocking the juice in the con¬ tainer by rapidly cooling the container and juice to a temperature of about -1°C to 2°C.The headspace volume can preferably be about 3% to 7% and the fruit can be sanitized with a sanitizing agent, which can be selected from the group consisting of chlorine, peroxide, bleach and an oxidizing agent. The sanitizing agent can be chlorine in water.The invention relates to a process for preserving fresh fruit juice which comprises: (a) sanitizing the outer surface of a fruit from which juice is to be extracted with a sanitizing agent to inactivate spoilage organisms; (b) extracting juice from the edible portion of the fruit; (c) gasifying the juice at about 5°C to 20°C by bubble stream- ing an oxygen-containing, carbon dioxide-containing gas mixture through the juice; (d) filling a high gas barrier container with the juice to a level to attain a headspace volume of about 3 to 7% of the total juice volume; (e) hermetically sealing the container; and (f) rapidly cooling the juice in a container to a temperature between about - 1°C and 2°C with a minimum hold time of about 12 to 24 hours.
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