Method of preserving blueberry with intermittent ozone processing

Abstract

The invention relates to the field of fruit and vegetable preservation, and specifically relates to a method of preserving blueberry with intermittent ozone processing. The method includes: performing precooling processing after harvesting blueberry, and putting the blueberry in refrigeration storage to perform intermittent ozone processing. The intermittent ozone processing includes performing ozone processing for 50-70 min for the first time by using the ozone gas with the concentration of 2-3 ppm, and performing ozone processing once by using the ozone gas with the same concentration every several days until the storage period finishes, wherein each processing time shortens several minutes based on the processing time of last time. Compared with low temperature storage, the healthy fruit rate of blueberry is greatly improved by using the method of the invention, and the quality of blueberry is improved. The method has no chemical agent residual, and meets the requirement of food safety.

Description

technical field

[0001] The invention relates to the field of fresh-keeping of fruits and vegetables, in particular to a method for intermittent ozone treatment of fresh-keeping blueberries. Background technique

[0002] Blueberry is one of the emerging small berries in China in recent years. Blueberry fruit is suitable for sweet and sour, with unique flavor and rich nutrition. It has health care functions such as preventing brain aging, anti-cancer, enhancing body immunity and improving eyesight. one. Blueberry fruits generally ripen in summer, when the field heat and respiratory heat are high, the respiration of postharvest fruits is enhanced, and various physiological metabolisms are accelerated, resulting in blueberry fruits that are not resistant to storage, and the storage period at 20°C is only about 1 week. The postharvest quality decline of blueberries is mainly manifested in the loss of water, the decrease of hardness, the softening of the pulp, and the pedicle sc...

Examples

Embodiment 1

[0026] A method for intermittent ozone treatment of fresh-keeping blueberries, carried out as follows:

[0027] After the blueberries are harvested and pre-cooled, they are placed in a cold storage at a temperature of 0°C, and the ozone gas with a concentration of 2ppm is used for the first ozone treatment for 60 minutes; thereafter, the same concentration of ozone gas is used for treatment once every 10 days, and the treatment time is the same as that of the previous time. Basically shorten by 5 minutes until the end of the storage period.

[0028] Take 3 batches of repeated samples to test the good fruit rate, the results are shown in the attached figure 1 .

Embodiment 2

[0037] A method for intermittent ozone treatment of fresh-keeping blueberries, carried out as follows:

[0038] After the blueberries are harvested and pre-cooled, they are placed in a cold storage at a temperature of 2°C, and the ozone gas with a concentration of 3ppm is used for the first ozone treatment for 60 minutes; thereafter, the same concentration of ozone gas is used for treatment once every 10 days, and the treatment time is the same as that of the previous time. Basically shorten by 5 minutes until the end of the storage period.

[0039] Three batches of repeated samples were taken to detect the good fruit rate.

[0040] Experiments have shown that the same fresh-keeping effect as in Example 1 can be achieved, so details are not repeated here.

Embodiment 3

[0042] A method for intermittent ozone treatment of fresh-keeping blueberries, carried out as follows:

[0043] After the blueberries are harvested and pre-cooled, they are placed in a cold storage at a temperature of 0°C, and the ozone gas with a concentration of 2ppm is used for the first ozone treatment for 50 minutes; thereafter, they are treated with the same concentration of ozone gas every 8 days, and the treatment time is the same as that of the previous time. Basically shorten 3 minutes until the end of the storage period.

[0044] Three batches of repeated samples were taken to detect the good fruit rate.

[0045] Experiments have shown that the same fresh-keeping effect as in Example 1 can be achieved, so details are not repeated here.

technical field

[0001] The invention relates to the field of fresh-keeping of fruits and vegetables, in particular to a method for intermittent ozone treatment of fresh-keeping blueberries. Background technique

[0002] Blueberry is one of the emerging small berries in China in recent years. Blueberry fruit is suitable for sweet and sour, with unique flavor and rich nutrition. It has health care functions such as preventing brain aging, anti-cancer, enhancing body immunity and improving eyesight. one. Blueberry fruits generally ripen in summer, when the field heat and respiratory heat are high, the respiration of postharvest fruits is enhanced, and various physiological metabolisms are accelerated, resulting in blueberry fruits that are not resistant to storage, and the storage period at 20°C is only about 1 week. The postharvest quality decline of blueberries is mainly manifested in the loss of water, the decrease of hardness, the softening of the pulp, and the pedicle sc...

Examples

Embodiment 1

[0026] A method for intermittent ozone treatment of fresh-keeping blueberries, carried out as follows:

[0027] After the blueberries are harvested and pre-cooled, they are placed in a cold storage at a temperature of 0°C, and the ozone gas with a concentration of 2ppm is used for the first ozone treatment for 60 minutes; thereafter, the same concentration of ozone gas is used for treatment once every 10 days, and the treatment time is the same as that of the previous time. Basically shorten by 5 minutes until the end of the storage period.

[0028] Take 3 batches of repeated samples to test the good fruit rate, the results are shown in the attached figure 1 .

Embodiment 2

[0037] A method for intermittent ozone treatment of fresh-keeping blueberries, carried out as follows:

[0038] After the blueberries are harvested and pre-cooled, they are placed in a cold storage at a temperature of 2°C, and the ozone gas with a concentration of 3ppm is used for the first ozone treatment for 60 minutes; thereafter, the same concentration of ozone gas is used for treatment once every 10 days, and the treatment time is the same as that of the previous time. Basically shorten by 5 minutes until the end of the storage period.

[0039] Three batches of repeated samples were taken to detect the good fruit rate.

[0040] Experiments have shown that the same fresh-keeping effect as in Example 1 can be achieved, so details are not repeated here.

Embodiment 3

[0042] A method for intermittent ozone treatment of fresh-keeping blueberries, carried out as follows:

[0043] After the blueberries are harvested and pre-cooled, they are placed in a cold storage at a temperature of 0°C, and the ozone gas with a concentration of 2ppm is used for the first ozone treatment for 50 minutes; thereafter, they are treated with the same concentration of ozone gas every 8 days, and the treatment time is the same as that of the previous time. Basically shorten 3 minutes until the end of the storage period.

[0044] Three batches of repeated samples were taken to detect the good fruit rate.

[0045] Experiments have shown that the same fresh-keeping effect as in Example 1 can be achieved, so details are not repeated here.

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