2.4. Composter
Substrate was prepared in a 600 L plastic tank (97 cm diameter and 112 cm of height). Top 27 cm of the tank consisted of a 55 cm diameter neck (Fig. 1). The tank was cut lengthwise in the middle, hinged on one side and with three quick locking snaps on the other one. Six wheels were located under its base to facilitate its move- ment. Inside, the material was placed on a wire mesh located 10 cm from the bottom of the tank. The bottom had 3 cm diameter opening to permit air to enter. On top, a cover with holes allowed an outlet for vapor and hot air exhaust.