Same goes with using old moldy hay.
Now I can use a solar system to try to get to the seed killing temperature.
But I am thinking I could run some copper and cement it in to form a area that I could water heat.
I could use a rocket stove to heat the water.
I put the material in the heat area, and cover with tarp.
Start up the rocket stove and get the water and the cement heating up.
Use a compost thermometer to make sure the right temp is reached.
When it get cool enough either sheet compost this material or add to a clean compost mix for use later.
You could process a large batch with hot water, and then use freely as you need. Not a fun job, but effective
William Bronson wrote: Hot shit sounds awful! More seriously, I would rather feed it to compost worms and?or chickens, and use the results. A gas producing biodigester is another idea. Anything rather than imputing energy to turn it into a resource. The solar sounds plenty good,maybe sheet mulch and then lay plastic across it to solarize it. Works on grass, it will probably work on seeds. You could plant right through the plastic.
i like the holey sheet idea. but an open air tank to super heat the water with your RMH should work then run it out through a hose that can handle the high temps..