A static composting device (Guo et al., 2011) was composed of
five cylindrical fermenting tanks with their inner and outer diameters separately measured 0.6 m and 0.7 m; and the fermenting
tanks had a two-layer stainless steel shell whose space between
the two layers was filled with heat insulating material, and a round
and perforated stainless steel bottom on which the compost matrix
can placed.