Risk assessment on processing facility of raw organic garbage

Area of Science:

• Environmental Science
• Chemical Engineering
• Materials Science

Background:

• Garbage disposal processes can pose explosion risks.
• Understanding the thermal properties of raw garbage is crucial for safe disposal.

Purpose of the Study:

• To investigate the cause of an explosion during raw garbage disposal.
• To determine the effect of oil concentration on garbage thermal properties and reaction behavior.

Main Methods:

• Thermo gravimetry-differential thermal analysis (TG-DTA) was used to examine garbage properties.
• Laboratory-scale simulation of the disposal process with controlled heating and air flow.

Main Results:

• Increased oil concentration decreased the exothermal reaction onset temperature.
• Simulated disposal of 14.1% oil garbage at 150°C resulted in smoldering, smoke, and a temperature rise to 1070°C.
• Flammable gases (CO2, CO, H2, methane, ethane) were produced, indicating potential for flame or explosion.

Conclusions:

• Oil content significantly influences the thermal instability of raw garbage.
• Smoldering can transition to explosion due to the accumulation of flammable gases generated during disposal.