This is really cool actually, the irradiation can also prevent seeds from germinating!
I would think a electron beam would be more suitable for this (e-beam) but I'm not sure how one would even aquire something like that.
Electromagnetic spectrum would probably be the most plausible.
UV light: I would think this would be "somewhat" achievable. It acts more like a
Pasteurization though, rather than irradiation. Unfortunately you would need over 1000w of UV though and that is costly and would probably require you to make it yourself. You would probably have to use several ballast's and a lot of germicidal bulbs daisy chained together.
Gamma: I'm not exactly sure how you would go about this either. You would need some sort of radioactive material that expels gamma rays in a collimator of some sort. That or a synchrotron or something similar to a partial accelerator which makes my brain hurt thinking about lol.
X-rays: Which acts like "pool" in a sense by shooting protons that "knock" other protons out of another atom. Again, would take some engineering and planning (if it's even legal in your state)
*Gamma rays and x-rays both expels radiation therfore is dangerous. (Given)
Of course all of that could be avoided by paying a 3rd party.
Irradiation does not make foods radioactive, compromise nutritional quality, or noticeably change the taste, texture, or appearance of food. In fact, any changes made by irradiation are so minimal that it is not easy to tell if a food has been irradiated. So I think it's safe to say the ants wouldn't mind.
As far as nitrogen flushing this could very well be done. It greatly reduces the expiration time. I would think all one would have to do is replace the oxygen in the bag with c02 and seal it securely under a vacuum so no oxygen gets back in.
Edited by iXvXi, February 12 2016 - 2:33 PM.