Effects of the addition of municipal solid waste incineration fly ash on the behavior of polychlorinated dibenzo-p-dioxins and furans in the iron ore sintering process. (July 2018)

• Record Type: Journal Article
• Authors: Min, Yi; Liu, Chengjun; Shi, Peiyang; Qin, Chongda; Feng, Yutao; Liu, Baichen
• Is Part Of: Waste management. Volume 77(2018)
• Page Start: 287
• Page End: 293
• Publication Date: 2018-07
• Subjects: MSWI fly ash addition -- Iron ore sintering -- PCDD/F behavior; Hazardous wastes -- Periodicals; Refuse and refuse disposal -- Periodicals; 363.728
• DOI: 10.1016/j.wasman.2018.04.011
• Languages: English
• ISSNs: 0956-053X

Abstract

Graphical abstract: Highlights: A new method for MSWI fly ash treatment is proposed. Most of PCDD/Fs containing in MSWI fly ash were decomposed during co-sintering process. Concentration of the lower and middle chlorinated PCDD/F congeners increased. Co-sintering generated more PCDD/Fs (about 4 times of no MSWI fly ash addition). Co-sintering may be an important solution with technological development. Abstract: Raw materials were co-sintered with municipal solid waste incineration (MSWI) fly ash through iron ore sintering to promote the safe treatment and utilization of MSWI fly ash. To assess the feasibility of this co-sintering method, in this study, the effects of the addition of MSWI fly ash on the formation and emission of polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) were estimated via iron ore sintering pot experiments. During co-sintering, most of the PCDD/Fs in the added MSWI fly ash were decomposed and transformed into PCDD/Fs associated with iron sintering, and the concentrations of lower- and mid-chlorinated congeners increased. As there was a sufficient chlorine source and the sintering bed permeability was decreased by the addition of MSWI fly ash, the PCDD/F concentration in the exhaust gas increased. The mass emission of PCDD/Fs decreased; however, the emission of toxic PCDD/Fs increased beyond the total emissions from the independent MSW incineration and iron ore sintering processes due to the transformation of PCDD/F congeners. The co-sintering may be an important solution after technological improvements in the flue gas cleaning system and PCDD/F formation inhibition procedures.