Process and plant for producing heat treated growth substrate and manure

摘要

In order to produce a thoroughly pasteurized growth substrate or manure the raw material is brought to pass through a perforated, tubular heating kiln (28), in which it is heated to some 90-100 DEG C, this being a dangerously high temperature with respect to ignition of the material and the gases developed therefrom. For eliminating the ignition risk the inlet and outlet ends of the tubular kiln (28) are blocked for entrance of atmospheric air, such that the atmosphere inside the kiln is maintained highly humid and low on oxygen.