This is a waste-to-energy recovery method, the process of chemically decomposing organic materials such as plastics and rubber at an elevated temperature in the absence of oxygen. Which term is being referred to?

Pyrolysis chemically decomposes organics like plastics and rubber at high temperature in the absence of oxygen to recover energy.

Pelletization only densifies waste into pellets and involves no thermal cracking.

Bio-methanation is microbial digestion, not high-temperature breakdown.

Leachate names a drainage liquid, not a treatment process.

Pyrolysis yields char, oil and combustible gases that can be used as fuel.

Because oxygen is excluded, the material breaks down rather than burning.