The document describes experiments drying alfalfa leaves using an acoustic vacuum vortex dryer. 1 kg of leaves was dried in just 5 seconds by the dryer without any heated air or heat source, using only 80W per kg. While the drying process is patented, scaling it up loses the economic benefit as too much energy would be needed for higher productivity.

1. 1. Material drying: alfalfa leaves (70-75%)
Photos of our experiments on a pilot dryer- vacuum the vortex. The result is phenomenal. 1 kg of leaves from input to output was dried in 5
seconds. The heat source is absent. The air is not heated. Costs 80W per kg. The drying process is patented. But the economic benefit is lost
with an increasing of productivity. Too much energy is needed. The only way to achieve this result is acoustic drying.