Risk assessment on processing facility of raw organic garbage

The disposal process was then simulated in a laboratory-scale facility being heated by hot air of 150 °C, which was blown into the bottom through nozzles. In the case of the dried garbage containing 14.1% oil, white smoke emitted after several hours, accompanying with an abrupt rise of the temperatures in particular at the bottom of the facility. The maximum temperature reached to 1070 °C. Meanwhile, gases, including flammable ones, whose amounts were CO2 ≈ CO > H2 > methane > ethane in order, were yielded. It indicated that smoldering developed from the zones near the hot air supply nozzle and propagated along the pathway of the imposed air. The continuously released gases possibly induced the transition of smoldering to flame or explosion after accumulating for hours.