介质阻挡放电在农业领域的应用研究进展

Review for Application of Dielectric Barrier Discharge in Agriculture

介质阻挡放电(DBD)是目前放电技术研究的焦点,具有简单、低廉、易控制、能耗少、用途广等特点,但在农业领域的应用尚处于起步阶段。本文结合近年来的研究成果,对DBD在农业育种、农产品加工与贮藏、农业工程、农业环境保护以及农产品质量安全等农业热点领域的研究进行论述,分析与探讨相关的技术要点和存在的问题,并对DBD技术在农业领域的应用前景进行展望。

Dielectric barrier discharge （DBD） is hot focus of the discharge technology at present, which owns some advantages, such as simplicity, low cost, easy operation, low-energy consumption, extensive usages and so on. When the DBD reactor worked with two electrodes, the non-thermal plasma （NTP） was ignited by At, He, N：, 02 or their mixtures as working gas, which could produce a large amount of X-ray, free radicals, ions, excited atoms and other highly active substances. Hence, the NTP is capable of providing sufficient energy for many chemical reactions. Although the NTP technique could be employed to the nearly whole agricultural production chain from the environment to products, the applications of DBD in agricultural field were just at the beginning step so far. According to the recent references, the detailed conditions of DBD application in agricultural breeding, sterilization, processing and storage, mechanization and engineering, environmental protection, and agro-food quality and safety were introduced. For breeding, DBD could be applied to microbial mutation and seed quality treatment; for the processing of agricultural product, DBD could be employed to sterilization, washing, starch modification, fruit and vegetable storage via ethylene degradation, and so on; for equipment, DBD could be used as a core unit for the ozone generator; for environment protection, DBD could be utilized to degrade microbes, pesticide and veterinary residues, persistent organic pollutants and others in water and soil, and particle matter （ PM）, total hydrocarbon （THC）, NOx, etc. in tail gas from machines; for analytical instrumentation, DBD usually served as an ionization source for mass spectrometry, and an atomizer and excitation unit for atomic spectrometry. In addition, in order to improve the modern agriculture development and protect human＇s health and safety, the critical characterization and problems, and the future development for the DBD techniques in agricultural fields mentioned above were analyzed and discussed.