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11 .3.6 Incineration Facilities <br /> By the year 2000, an estimated 1 , 115 tons of hazardous waste that <br /> require incineration are projected to be generated in the County <br /> (Table 8-1) . This amount is well below the 5,000 tons per year <br /> handled by a typical incinerator. These "incineratable" wastes are <br /> typically organic liquids and solids that cannot be reclaimed economi- <br /> cally. Liquid feedstreams are filtered and solids shredded prior to <br /> placing the wastes into the incinerator. As noted in the DHS JgLbnL- <br /> cal Reference Manual , satisfactory destruction efficiency requires <br /> adequate temperature, time, and turbulence. Thus, hazardous waste <br /> incinerators include well -designed primary heating and secondary <br /> after-burner zones. While a fixed-hearth burner with liquid injection <br /> can be used for liquids, a rotary kiln has the added advantage of good <br /> mixing and residence time for solid hazardous wastes. Many waste <br /> streams have sufficient heat of combustion to reduce the cost of <br /> incineration through recovery of heat as process steam or by <br /> cogeneration of electricity. <br /> Incinerator operations typically require from 4 to 10 acres of land <br /> and employ from 2 to 12 individuals. A small incinerator might des- <br /> troy 5,000 tons of waste per year, requiring perhaps only five incom- <br /> ing truckloads of waste per week. A large incinerator could handle up <br /> to 100,000 tons annually, and be served by 92 trucks per week. <br /> A typical rotary kiln incinerator has such obvious visual and aesthet- <br /> ic impacts as a smokestack and storage tanks and support buildings. <br /> Careful operation measures should include good monitoring of the qual - <br /> ity of the waste feed-streams, the stack exhaust, and the "bottoms" <br /> residue. Spill containment and establishment of an emergency response <br /> plan are also required. Cyclones and electrostatic precipitators or <br /> baghouses may be needed to trap fly ash and aerosols to avoid their <br /> emission to the atmosphere. Scrubbers or alkaline additives may be <br /> required to limit acidic gases to acceptable levels. <br /> PJ9 9390502D.00D 11-17 Rev. 1 11/08/88 <br />