Improvements in dioxin abatement strategies at a municipal waste management plant in Barcelona.

This study presents the results of a dioxin abatement programme undertaken in the municipal waste incineration plant of Montcada i Reixac (Barcelona, Spain) after the replacement of an obsolete air cleaning device by a new flue gas treatment system. A number of sampling campaigns were conducted with the aim of characterising stack gas emission levels of polychlorinated dibenzo-p-dioxins (PCDDs)/polychlorinated dibenzofurans (PCDFs) and to evaluate initial specifications of dioxin stack gas emission values below 0.1 ng I-TEQ/Nm(3). Preliminary results revealed levels between 44 and 111 ng I-TEQ/Nm(3) when the gas-cleaning system consisted only of an old electrostatic precipitator (ESP). Decreased levels around 15 ng I-TEQ/Nm(3) were observed when the semi-dry scrubber began to operate and the ESP was switched off. Again, remarkable dioxin removal was observed after the installation of the fabric filter and levels around 0.3-0.4 ng I-TEQ/Nm(3) were soon achieved. Nevertheless, the limit of 0.1 ng I-TEQ/Nm(3) was reached by additional injection of activated carbon which helped to lower PCDD/PCDF levels to around 0.036 ng I-TEQ/Nm(3). The results also demonstrated a significant change in the dioxin distribution present in combustion-derived materials (stack gas emission, bottom ash and solid waste from gas treatment). The major dioxin fraction was found in gaseous matrices before the flue gas control system was upgraded. After this step, the major dioxin fraction content was observed in solid waste from gas treatment.

[1]  M. Giugliano,et al.  PCDD/F mass balance in the flue gas cleaning units of a MSW incineration plant. , 2002, Chemosphere.

[2]  M Giugliano,et al.  The flux and mass balance of PCDD/F in a MSW incineration full scale plant. , 2001, Chemosphere.

[3]  Kees Olie,et al.  Chlorodibenzo-p-dioxins and chlorodibenzofurans are trace components of fly ash and flue gas of some municipal incinerators in The Netherlands , 1977 .

[4]  K. Ballschmiter,et al.  Automobile exhausts versus municipal-waste incineration as sources of the polychloro-dibenzodioxins (PCDD) and -furans (PCDF) found in the environment , 1986 .

[5]  V. Thomas,et al.  Peer reviewed: the u.s. Dioxin inventory: are there missing sources? , 1996, Environmental science & technology.

[6]  K. Olie,et al.  Formation and fate of PCDD and PCDF from combustion processes , 1983 .

[7]  A. Liem,et al.  Study of polychlorinated dibenzodioxins and furans from municipal waste incinerator emissions in The Netherlands: analytical methods and levels in the environment and human food chain. , 1993, Journal of chromatography.

[8]  W. M. Sierhuis,et al.  PCDD/F emissions related to the operating conditions of the flue gas cleaning system of MWI-Amsterdam , 1996 .

[9]  M. Schuhmacher,et al.  PCDD/F Levels in the Vicinity of an Old Municipal Solid Waste Incinerator: Temporal Variation in Soils , 1999, Archives of environmental contamination and toxicology.

[10]  H. Fiedler.  Sources of PCDD/PCDF and impact on the environment. , 1996, Chemosphere.

[11]  M. Schuhmacher,et al.  Temporal Variation of PCDD/PCDF Levels in Environmental Samples Collected Near an Old Municipal Waste Incinerator , 2001, Environmental monitoring and assessment.

[12]  E. Abad,et al.  Application of DB-5ms gas chromatography column for the complete assignment of 2,3,7,8-substituted polychlorodibenzo-p-dioxins and polychlorodibenzofurans in samples from municipal waste incinerator emissions , 1997 .

[13]  E. Abad,et al.  Dioxin abatement strategies and mass balance at a municipal waste management plant. , 2002, Environmental science & technology.

[14]  H. Hagenmaier,et al.  Correlation of environmental occurrence of polychlorinated dibenzo-p-dioxins and dibenzofurans with possible sources , 1994 .

[15]  R. Boos,et al.  Samplings of PCDDs and PCDFs at the MWI Spittelau/Vienna , 1994 .

[16]  M. Schuhmacher,et al.  Presence of dioxins and furans in vegetation samples collected in the neighbourhood of a municipal solid waste incinerator , 1998 .

[17]  M. Schuhmacher,et al.  Monitoring dioxins and furans near an old municipal solid waste incinerator: Temporal variation in vegetation , 1999 .

[18]  Christoffer Rappe,et al.  Dioxin, patterns and source identification , 1994 .

[19]  E. Abad,et al.  Evaluation of a new automated cleanup system for the analysis of polychlorinated dibenzo-p-dioxins and dibenzofurans in environmental samples. , 2000, Journal of chromatography. A.

[20]  M. Schuhmacher,et al.  PCDD/Fs in Soil Samples Collected in the Vicinity of a Municipal Solid Waste Incinerator: Human Health Risks , 1997, Archives of environmental contamination and toxicology.