Abstract
Publisher Summary This chapter examines the composition and leachability of the different particle size fractions found in municipal solid waste (MSW) bottom ash. The possibilities for improving the suitability of MSW bottom ash for use in road construction are investigated. The incineration of MSW results in a mass reduction of approximately 70%, the amount of residue remaining to be disposed of after incineration is substantial. The work presented in the chapter discusses the chemical characteristics of different physical fractions of bottom ash from the Goppingen regional energy-from-waste facility. This facility incinerates approximately 2,00,000 t/a of municipal solid waste containing a maximum of 10% sewage sludge. The incineration temperature is approximately 850°C. After quenching, the bottom ash is dressed by sieving and magnetic separation of metals. Particles smaller than 32 mm are retained for utilization. Boiler ash, which is compositionally more similar to the more hazardous fly ash, is collected separately at the Goppingen facility, but the grate siftings are still collected together with the bottom ash. The chapter lists the test methods applied to particle size fractions of bottom ash. The particle size distribution for the Goppingen bottom ash examined is graphically represented in the chapter.
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