DETERMINATION AND REDUCTION OF PCDD F EMISSIONS FROM WOOD BURNING FACILITIES/

Seven wood burning facilities were analyzed for their emissions of PCD D/F and other parameters while th input was varied. PCDD/F emission co ncentrations ranged from 0.004 to 9.820 ng l-TEQ/Nm(3), with the major ity of values > 0.1 ng l-TEQ/Nm(3), even in the input was untreated wo od. Highest concentrations occurred after addition of halogenated mate rials (NH4Cl hardened or PVC coated plywood) to the input. Using typic al input materials, facilities with smaller thermal capacity (< 1 MW) showed emission freights ranging from 0.03 to 0.4 mu g l-TEQ/h, while the large ones (> 1 MW) emitted 0.07 to 0.5 mu g l-TEQ/h. Using treate d input materials, emission freights of smaller facilities reached 1.6 mu g l-TEQ/h, while the large plants released up to 7.2 mu g l-TEQ/h.