3. Pyrolysis
Pyrolysis = thermal decomposition process which takes place in the total absence of oxygen.
Only used for specific waste streams, and is not often used on a large scale Not commonly used for mixed hazardous wastes.
Products of pyrolysis: .combustible gases.
mixed liquid residue.
Advantages:
low operating temperature -never exceeding 500 c
no need for excess air ess flue gas.
by-products are combustible.