Biological Systems Engineering


Date of this Version



Published in Encyclopedia of Agricultural, Food, and Biological Engineering, Second Edition, ed. Dennis R. Heldman & Carmen I. Moraru, v. 1, pp. 470-473; doi: 10.1081/E-EAFE2-120046040 470


Copyright © 2010 Taylor & Francis. Used by permission.


Extrusion processing is applied widely because of its versatility and the fact that no waste streams, other than some heat, are generated. The versatility is a result of the way extruders are designed, in terms of the way preconditioning and postprocessing operations can be added with ease, and in terms of the wide range of processing conditions that can be generated through the selection of barrel, screw, and die options and operating conditions, such as temperature, screw speed, and feed moisture content.