This has two stages to composting of products in putrefaction derived from waste materials, organic and / or sludge

摘要

A method for composting decaying material by first treating the material to produce a decayable carbon/nitrogen ratio and continuously and countercurrently aerating the decaying material in a first step to produce a biologically active material and then introducing the biologically active material to a second step wherein it is discontinuously aerated at controlled intervals. The process produces a hygienically unobjectionable humus material in a continuous and industrially efficient manner.