Fluidized bed combustion (FBC) is a combustion technology used to burn solid fuels. In its most basic form, fuel particles are suspended in a hot, bubbling fluidity bed of ash and other particulate materials (sand, limestone etc.) through which jets of air are blown to provide the oxygen required for combustion or gasification.
Unlike virtually any other kind of waste treatment, plasma recycling can cope with virtually any kind of waste, including the most hazardous, high-grade, and hard-to-treat forms (toxic incinerator ash, hazardous medical waste, toxic metals, electronic components, and so on).
Renewable natural gas plants based on wood can be categorised into two main categories, one being allothermal, which has the energy provided by a source outside of the gasifier. One example is the double-chambered fluidised bed gasifiers consisting of a separate combustion and gasification chambers.
The resulting gas mixture is called syngas (from synthesis gas) or producer gas and is itself a fuel. The power derived from gasification and combustion of the resultant gas is considered to be a source of renewable energy if the gasified compounds were obtained from biomass.