Is this the start of 'Mr Fusion'?

Neat.
Bio-waste incinerators have switched over to microwave ovens. Perhaps they can extract something useful from used agar.

This doesn't apply to the OP, but needs addressing.

This isn't waste. This is compost. Arguably it is all compost, but this waste produced on the farm should go back into the soil to replenish what the plants took out. Otherwise, you'll need to use more outside fertilizers.