L.M. Grillo, Municipal solid waste (MSW) combustion plants, in: Waste to Energy Conversion Technology, 2013, p. 83 ([Internet, 2022-07-22](https://www.sciencedirect.com/topics/engineering/combustion-air))
Overfire air is injected into the active flame zone to provide additional air to complete burnout of the volatile gases, which are produced by heating the waste.