### (PDF) Design Models of Trommels for Resource Recovery

= distance a particle moves longitudinally in the trommel per impingement L NOTATION L = length of the trommel L Dimensions M mass feedrate M/t (mass = length, n = number of impingements Symbol Meaning time) needed to achieve a desired a = size of a trommel hole - side eficiency of a square hole, diameter of p = Probability that a particle a round hole, short side of a passes through a hole per