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微波通常是指频率在300兆赫到3004兆赫之间的电磁波。由于微波的波长与通常无线电波的相比更为微小,故称为“微波”。目前微波加热干燥方面所采用的主要是915和2450两个频率。据文献报导,用微波加热10安瓿,杀死鼠伤寒、沙门氏菌只需15秒钟,杀死金黄色葡萄球菌、大肠杆菌和绿脓杆菌只需20秒钟,杀死耐热的枯草芽胞杆菌只需30秒钟。美国研究一种利用微波除草和灭虫灭菌的设备,称之为泽波(ZAPPER),它所产生的微波照射到杂草、草籽及土壤中的害虫、
Microwaves generally refer to electromagnetic waves with frequencies between 300 MHz and 3004 MHz. Since the microwave wavelength is much smaller than that of a normal radio wave, it is called “microwave.” At present, microwave heating and drying are mainly used at two frequencies of 915 and 2450. It is reported in the literature that using microwaves to heat 10 ampoules to kill typhoid fever and salmonella takes only 15 seconds, killing Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa in just 20 seconds, killing heat-resistant B. subtilis only It takes 30 seconds. The U.S. has studied a device that uses microwaves for weed control and disinsection, called ZAPPER, which produces microwaves that irradiate weeds, grass seeds, and soil pests.