Microwave technologies in general and the ability for them to sterilize spices and starch is good, it is a thermal process. The advantage is volumetric heating (so you can heat up a bulk due to creation of kinetic energy from the rapid rotation of polar molecules, like water, in the electromagnetic field). Some people also make the list of the disadvantages are that there can be non-uniform heating that could either create cold spots so you don't get uniform sterilization (microbial kill) or hot spots (scorching). These are the same problems you would experience at home with your 2450 MHZ unit. However, the shape of food we heating by home microwave is usually unstable and random, the heating uniform is also not easily achieved. To overcome this non-uniform heating in the industry, MAX Industrial Microwave adopts our own design feeder which uniformly lays the material on the belt by. Secondly, we design and install microwave magnetron on the top of belt which can cover each position of material to guarantee the heating uniform. Our microwave design assures every position which got heated by microwave.

If the products are packaged in plastics or glass with plastic closures then it would be possible to sterilize post packaging by microwave. You would want to make sure that any plastic packaging you would pick would not melt in a microwave. Glass is ok -but it is not possible to use a metal lid. If you were going to use glass, it would be a good idea to put a heat sealed liner on the top of the jar opening, and then microwave - since this would almost completely eliminate the risk of recontamination

915Mhz does have a better penetration depth than 2450Mhz. But it is typically used for defrosting thick ice block food and ceramic. For food heating, drying and sterilization, 2450Mhz is more common and enough to process material.

You will need to know the level of microbial contamination for the products you want to treat including bacterial amount before sterilization and final target. During the sterilization process, we also need make sure quality isn't affected (they turn brown or discoloration).

You are welcomed to visit us and have a trail to check microbes per gram and discoloration.MAX microwave starch and spice sterilization machine is widely used in the kill microbial industry especially in onions powder, starch, herbs and spices.