Emerging Technologies

Numerous emerging technologies have been used or proposed for the thermal destruction of wastes, more so for liquid and solid wastes than for gaseous wastes. The reason is clear: most gaseous wastes that are candidates for thermal destruction carry large quantities of inert diluents (CO2, H2O, and N2), whereas some of these emerging technologies are energy intensive because they operate at high temperatures.

Some of these technologies have been available for decades and will probably not find widespread application. However, some technologies combine thermal destruction with the formation of a useful product. Consequently, product formation enhances the advantages of thermal incineration, in which energy recovery is the chief economic benefit.

Preconcentration (adsorption and desorption or absorption and desorption) can be a suitable pretreatment to one of these techniques, though rarely practiced. Also, numerous emerging technologies are not thermal in nature. Table 5.21.2 lists several emerging technologies based primarily on the availability of practical and theoretical information but not restricted to gaseous wastes.

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