A blueberry juice non-thermal sterilization micro-processing chamber, sterilization system and sterilization method

Abstract

The invention provides a blueberry juice non-thermal sterilization micro-processing chamber and a sterilization system and sterilization method using the micro-processing chamber. The electrode spacing is shortened by means of a microchip, the volume is small, and the same sterilization effect is guaranteed. The reduced voltage can replace a series of equipment such as voltage amplifiers. Compared with the traditional high-voltage pulsed electric field sterilization, the operability is significantly improved, and the cost is effectively reduced; the temperature rise range is small, and there is no pressure change during the treatment process. Secondary pollution will not affect the sensory quality of blueberry juice, and can promote the dissolution of anthocyanins, so that high-quality blueberry juice can be obtained while effectively killing microorganisms; at the same time, due to the precision of the microchip, the experiment is greatly improved. Accuracy, sterilization parameters can be strictly controlled, and it is possible for the factory to digitally sterilize.

Description

technical field [0001] The invention belongs to the technical field of fruit juice sterilization, and in particular relates to a non-thermal sterilization micro-processing chamber, a sterilization system and a sterilization method for blueberry juice. Background technique [0002] Blueberries are popular among consumers due to their rich nutritional value and health functions. However, due to their seasonality and intolerance to storage, about 50% of blueberries in the world are processed into juice or other products. For heat-sensitive fruit juices represented by blueberry juice, thermal sterilization will have a certain impact on their nutritional and sensory qualities, thus deriving non-thermal processing technology. [0003] High-voltage pulsed electric field (PEF) is a non-thermal sterilization technology that achieves food commercial sterility by destroying microbial cell membranes. Due to its small temperature rise and no pollution to the environment, it can minimize ...

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Problems solved by technology

[0003] High-voltage pulsed electric field (PEF) is a non-thermal sterilization technology that achieves food commercial sterility by destroying microbial cell membranes. Due to its small temperature rise and no pollution to the environment, it can minimize the damage to food sensory and nutritional quality. It can effectively kill most microorganisms, which has aroused the research interest of people in the industry at home and abroad. However, the pulsed electric field sterilization technology has the following problems in practical applications: (1) Generally, high voltage is required to obtain high field strength, and high-voltage pulse generators The cost is high; (2) The PEF treatment chamber is composed of two electrodes and insulating materials. The electrodes are under high voltage, which is prone to electrolysis and produces strong oxidizing substances, which may form harmful substances to the human body and destroy the components of the treatment solution At the same time, electrode electrolysis will also affect the service life of the system; (3) In actual operation, there are shortcomings such as inaccurate control of operating parameters, high cost, and large volume.

The electrode spacing of the treatment chamber of the laboratory-scale PEF sterilization system is at least a few millimeters, and the voltage needs to reach several thousand volts to tens of thousand volts to obtain a high sterilization rate. Such a pulse generator is expensive and difficult to manufacture

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