Question

Which of the following is a method of waste disposal?

• A. Landfills
• B. Pyrolysis
• C. Incineration
• D. All of these

Answer 1

The correct option is D All of these

Waste disposal methods include following processes:
1. Landills: dumping of solid wastes into low lying areas.
2. Incineration: aerobic burning of waste at high temperature over ${1000}^{\circ }C$.
3. Composting: aerobic or anaerobic conversion of waste into humus by microbes.
4. Pyrolysis: anaerobic burning of wastes at high temperature.