Bilan intégré des émissions et installations fixes de combustion de métaux lourds en Alsace et dans le Bade-Wurtemberg

The emissions of the heavy metals As, Cd, Cr, Cu, Hg, Ni, Pb, Se, V, and Zn into the air, water, and by-products, caused by stationary combustion plants in Baden-Wurtemberg (Germany) and Alsace (France) are assessed. The main emphasis of the study is on the development of an adequate, process specifie tool allowing to determine mufti-media heavy metal emissions by bottom ash or slag, fitter ash, by-products of the flue gas desulphurisation device (FGD by-products), and flue gas from the use of fossil fuels in Baden-Wurtemberg and Alsace. The heavy metal mass streams are analysed systematically with regard to fuel composition, boiler type, operation mode and flue gas treatment deviees to define representative plants with regard to the partitioning of heavy metal streams. For these representative plants, partition factors, which characterise the distribution of heavy metals between flue gas and by-products , are determined. The emission factors are derived from the partition factors and the heavy metal concentrations in the fuels used. Then, the emission factors are associated with data on emission sources refering to the configuration of combustion installations and activity data (annual consumption of fuel) to assess the heavy metal emissions in the study region. Heavy metal emissions through bottom ash, filter ash, FGD by-products and flue gas as well as heavy metal deposition in plants are assessed for the sectors "public power plants", "Industriel combustion" and "domestic heating" for the base year 1992. The results are available for Baden-Wurtemberg and Alsace for each heavy metal, sector, emission pathway, and combustion technique.