Direct Mechanical Energy Measures Of Hammer Mill
468 mj/mg for both hammer and knife mills. hammer mill required more energy (414 mj/mg) than a knife mill (180 mj/mg) for 3.2 mm particle size. they observed that agricultural straw and corn stover required 6 to 36% of the effective speciﬁc energy required for wood. vigneault et al.  observed a 13.6% saving in total speciﬁc.