Fluidizedbed Incineration

Fluidized-bed incineration can handle sewage sludge containing as much as 35% solids. The sludge is injected into a fluidized bed of heated sand. The incinerator is a vertical cylinder with an air distribution plate near the bottom, which allows the air to enter the sand bed while also sup-

FIG. 10.10.4 Flow diagram of sewage sludge incineration plant with indirect heat dryer. (Reprinted, with permission, from M. Henmi, K. Okazawa, and K. Sota, 1986, Energy saving in sewage sludge incineration with indirect heat drier, National Waste Processing Conference, Denver, 1986 [ASMER].)
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