ETO sterilization for spice

There are three types of sterilization for spice(氧化乙烷灭菌 )(EtO, gamma, steam) :

with eo gas(eto sterilization)– spices treated with ethylene oxide (EtO) ,

with irradiation– spices treated with radiation (e.g. gamma rays, x-rays),
with steam(high temperature,and water steam).

1. Ethylene oxide sterilization (ETO)exposes the product to ETO gas under controlled conditions in a sealed chamber, to kill bacteria in the product.

优点：这是一种性价比高、应用广泛的杀菌方式，已经常见很多年了，买了机器就可以自己杀菌，成本很便宜。体积大（1-36托盘）（一次约1-35吨香料，具体取决于香料的密度）
缺点：ETO 是一种受到严格监管的气体。并且会比其他两种灭菌方式花费更多的时间（可以安装预热室和曝气室来解决这个问题）。

2. Irradiation exposes the product to gamma rays or electron beam radiation to sterilize it.
advantage: Most effective method and no chemicals are used in this process
Disadvantages: expensive price, will cause damage to the package, and public pressure due to the negative connotations of radiation has resulted in specific labeling requirements to disclose that the product is irradiated. That can be unappealing to consumers.

3. Steam sterilization is a process that uses hot steam in a controlled environment to heat the product.
advantage: No chemicals or radiation are used in this process.
disadvantage: high temperature, and if any moisture is introduced to the product, it can result in caking and molding, and change the color and flavor of spice.