Non-thermal sterilization micro-treatment chamber for blueberry juice, sterilization system and sterilization method

Abstract

The invention provides a non-thermal sterilization micro-treatment chamber for blueberry juice as well as a sterilization system and a sterilization method which use the micro-treatment chamber. The electrode distance is shortened by the aid of microchips, the size is smaller, the voltage is greatly reduced on the premise that the same sterilization effect is guaranteed, a series of equipment suchas a voltage amplifier can be replaced, and the operability is significantly improved and the cost is effectively reduced as compared with traditional high-voltage pulse electric field sterilization.The temperature rise amplitude is small and pressure change is avoided during treatment, secondary pollution cannot be caused, the sensory quality of the blueberry juice cannot be affected, and dissolution of anthocyanin can be promoted, so that high-quality blueberry juice can be obtained while microorganisms can be killed effectively. Meanwhile, due to the precision of the microchips, the experimental accuracy is greatly improved, sterilization parameters can be strictly controlled, and digital sterilization in factories becomes possible.

Description

technical field [0001] The invention belongs to the technical field of fruit juice sterilization, in particular to a non-thermal sterilization micro-processing chamber for blueberry juice, a sterilization system and a sterilization method. Background technique [0002] Blueberries are loved by consumers due to their rich nutritional value and health functions, but 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 the damage to food sen...

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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 very expensive and difficult to manufacture

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