Microwave sterilization is probably not very useful as it does not easily allow for you to sterilize the solution. It isn't like you'd just be able to put the liquid in the microwave and boil it. You need to get it to about 121*C and hold it at that temperature for a long time to ensure endospores have been destroyed. If microwave sterilization were done, it would likely just become an expensive and complicated autoclave or pressure cooker.
The simplicity of a pressure cooker is preferred, especially for what we are discussing.. or possibly a chemical means if the amount is too large to pressure cook/autoclave.
@Fresh1....
People like TLS, Sake, and fresh1 always seem to be overly excited about the topics we focus on, but often poison their own experiences and others with being too philosophical, outspoken, active and off topic. Sometimes it is best to just read and only comment on topics when you have something that is related and truly useful to the discussion. Its great to question the status quo, authority, and whatever else but it isn't always appropriate and it is detrimental to this site as it can and almost always stifles the real meat & bones of the conversation.