the composting device 1 includes a container 2 having rigid side walls 3 a base 4 an opening 5 hinged closure 6 and internal space 7 the container also has wheels 8 shown in a dotted line the container 2 is also the type commonly referred to as a u201c wheelie bin u201d the bins may be an 80 l 120 l 140 l or 240 l capacity located at the lower end of the container 2 is a load supporting means 37 broadly u201c barrier u201d which is formed by a plate 9 having a central aperture 10 broadly u201c connection opening u201d and side supports 11 to hold the plate 9 above the base 4 a fluid collection chamber 12 forms below plate 9 located centrally in bin 2 is aerator 13 aerator 13 is a column like structure having an internal air chamber 14 lower end 15 having an opening to the internal air chamber and upper end 16 the aerator 13 is formed by a wire mesh material and there is a multitude of apertures 17 along the length of aerator 13 and in the upper end 16 an air supply tube 18 extends from an air inlet 19 in side wall 3 through the aerator 13 and across the width of the container 2.