FLUE-GAS EMISSION MEASUREMENTS AT SMALL-SCALE AND INDUSTRIAL-SCALE WOOD FIRINGS WITHIN THE SCOPE OF THE 1ST-AMENDMENT TO THE FEDERAL GERMANPOLLUTION-CONTROL ACT

In the time of the heating period of 1993/1994, the course of the emit ted components CO, hydrocarbons, NOx, CO2, and O-2 were measured throu gh several processes of combustion in 26 wood firings which had been c hosen to represent this commercial sector of the Land of Baden-Wuertte mberg with regard to fuel and type of construction. Parallel measureme nts integrated the concentrations of poly-chlorinated dioxines and fur ans (PCDD/PCDF), as well as particles and isolated hydrocarbons at def ined states of operation. The mean CO concentrations, typical for the combustion quality, through several combustions in manually charged fi rings reached between 1500 mg/m(3) and 11 800 mg/m(3), and the CO conc entrations in automatically charged systems were between 130 mg/m(3) a nd 6450 mg/m(3). The particle concentrations ranged from 34 mg/m(3) to 443 mg/m(3). The concentrations of PCDD and PCDF mostly remained belo w 0.1 ngTE/m(3) given that only untreated wood was combusted. PCDD/PCD F concentrations of systems, where it could not be excluded that wood treated with wood preservatives had been used, amounted to 10 ngTE/m(3 ) and more.