Small Downdraft Gasifiers for Drying Yerba Mate Submitted by Erin Rasmussen on Mon, 03/13/2006 - 14:35 Small Downdraft Gasifiers for Drying Yerba Mate, Erik Barney, Obera Misiones, Argentina, March 2006 My name is Erik Barney, and I work at the Engineering Faculty in Oberá Misiones, Argentina, not far away from the big Iguazú Water fall.Erik Barney Read more about Small Downdraft Gasifiers for Drying Yerba Mate