Citrus juice processing technology

Preparation. Choose ripe oranges with good sugar content and good color to remove diseases and rot. Cleaning. First, we must wash out the dust and other substances on the surface of raw materials. Add 1% to 2% sodium hydroxide and disinfectant in clean water before washing. After the raw materials are soaked for a short time, they are cleaned by rotation and sprayed with washing water. press. Many types of presses, commonly used screw press. The fruit is first heated and peeled, and the seeds are also preferably removed. The fruit juice is then squeezed with a screw press. filter. The fresh juice obtained through the squeezing process must be clarified and filtered to obtain clear juice. Citrus fruit juice is squeezed out of the turbid juice, the juice contains mostly pulp slag, pulp skin and nuclear impurities, must be filtered immediately, otherwise bitter substances will dissolve in the juice affect the quality. The filter mesh has a diameter of 1 mm to 1.5 mm. Filtration can also be performed with a centrifuge. The filtered juice is homogenized by a homogenizer, so that the larger particles in the juice become smaller and more uniform, so as to avoid clouding after the bottle is filled, and the appearance and flavor of the citrus juice can be improved. Deployment. In order to make the finished product more in line with the consumer's taste and have certain quality specifications, it is necessary to adjust the sugar and acidity of the juice. General citrus juice with sugar content of 12% to 14%, with acid 0.7% ~ 0.8% is appropriate, vitamin C is not less than 200 mg / 100 g. Degassing. The prepared juice is rapidly heated to 88° C. for 1 minute to allow the air mixed in the juice to escape, or degassed at a vacuum of 90.6 to 93.2 kPa. Bottling and sterilization. The degassed juice is filled into sterile glass bottles or tin cans, sealed immediately, and placed in hot water at 85-90°C for 15-20 minutes. cool down. The sterilized juice bottles (tanks) are cooled step by step. The iron cans can be placed in a flowing water tank for cooling or spray cooling, and can be cooled to 40°C. Remove water and wipe it, and label it as a finished product.

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