COMPOSTING; METHOD AND APPARATUS COMPRISING A ROTATABLE DIGESTER DRUM WITH SPACED BAFFLES ALONG ITS LONGITUDINAL AXIS INSIDE THE DRUM, AND WITH INTERNAL RIBS AROUND THE DRUM CIRCUMFERENCE

摘要

A rotatable digester drum for convening organic waste material into compost which has internally disposed along its longitudinal axis a series of spaced-apart baffles, each baffle having a variable cross sectional area ranging from 60 to 100% of the cross sectional area of the drum and arranged with respect to one another when in the partially open mode to cause material and air introduced into the drum to traverse a non-linear path through the drum, the drum having a plurality of longitudinally extending internal ribs arranged in spaced array around its circumference.