ESTIMATED ANNUAL EMISSION OF PCDDS, PCDFS AND NON-ORTHO CHLORINE SUBSTITUTED COPLANAR PCBS FROM FLUE-GAS FROM URBAN WASTE INCINERATORS IN JAPAN

Flue gas samples were collected from 17 waste incinerators with a big combustion capacity in large urban cities and the suburbs in Japan, in order to evaluate a real situation for PCDDs, PCDFs and non-ortho chl orine substituted coplanar PCBs (Co-PCBs) emitted into the air through the flue gas. The average concentrations (ngTEQ/Nm(3)) of 2,3,7,8-PCD Ds, 2,3,7,8-PCDFs and Co-PCBs were 17.4, 20.9 and 3.11, respectively. This indicates PCDFs give higher environmental impact than do PCDDs or Co-PCBs. On the basis of above data, total amounts of PCDDs, PCDFs an d Co-PCBs annually emitted via flue gas from 397 continuous combustion type and big scale incinerators in japan were estimated to be 2.0, 5. 1 and 0.36 TEQKg, respectively. The total was 7.5 TEQkg.