Oct 09, 2016 · Secondly, prepare a dryer. As we all know, the wetter or dryer material will affect the final quality of biomass pellets, so you need a dryer to get the suitable moisture, which is always about 15%. Thirdly, Grinding alfalfa to get appropriate size for the alfalfa pellet machine. Finally, put the alfalfa to the feeder of the alfalfapellet mill.