本計畫以臺灣南部地區某大型壹座機械爐床及壹座固定爐床焚化爐為研究對象，探討煙道廢氣、濕式洗滌塔廢水、靜電集塵器飛灰及爐底灰中多環芳香烴化物（PAHs）之特徵及各污染防治設備對PAHs之去除效率。煙道樣品之採集係以一套具備冷凝系統之氣固相PAHs採樣設備為之，而二十一種PAHs之分析，主要以氣相層析質譜儀（GC/MS）為之。
　　本研究結果顯示機械爐及固定爐之PAHs排放總量分佈百分比非常類似，以煙道（93%）為主要排放源，其次依序為濕式洗滌塔廢水（4.8%）、靜電集塵哭飛灰（1.8%）及底灰（0.24%）。而機械爐及固定爐煙道廢氣之總PAHs濃度平均為1,290□g.NM3及635□g/Nm3，主要以二∼三環PAHs（Nap、AcPy 、Acp 、Flu、PA、Ant）為主（佔95%），其中以NAP之濃度最高。於整個煙道採樣器之分佈上，PAHs主要以氣相存在（96%），其次為粒狀相物（2.9%），冷凝水（0.82%）及管線殘留（0.38%）。靜電集塵器及濕式洗滌塔對高分子PAHs（BaA, CHR, BbF, BaP, PER, IND, BbC, BghiP）之平均去除率分別為12% 及40%，對低分子量PAHs（NsP, AcPy, Acp, Flu, PA, Ant）則低於5%。

　　A batch-type medical waste incinerator with one mechanical grate and on fixed grate was used to incinerate the infectious waste and pathological waste, respectively. The concentration and composition of 21 individual PAHs (polycyclic aromatic hydrocarbons) in the stack flue gas, the fly ash from ESP(electrostatic percipitator), the effluent from wet scrubber and the bottom ash were investigated. The stack flue gas samples were collected isokinetically by a PAH sampling system, while twenty one individual PAHs were primarily analyzed by the GC/MS.
　　The distribution of PAHs emissions from mechanical grate and fixed grate were similar. The stack gas was found to have the majority of total PAHs emission (93%), while the distribution of total PAH mass discharged from the wet scrubber, the fly ash from ESP and the bottom ash were only 4.8%, 1.8% and 0.24%, respectively. The mean total- PAHs concentrations were 1290ug/Nm3 and 635ug/NM3 in the stack flue gas of mechanical grate and fixed grate, respectively. The majority (95%) of total PAHs concentration was contributed by the two and three rings PAHs(Nap, AcPy, Acp, Flu, PA and Ant). Among these 21 individual PAHs, Nap had the highest mean concentration. PAh mass distribution collected by the PAH sampling system were 96%, 2.9%, 0.28% and 0.38% for the gas phase, particle phase, water from cooling device and residual in the pipe, respectively. The removal efficiency of ESP for higher molecular weihgt PAHs (BaA, CHR, BbF, BaP RF, PER, IND, BbC and BghiP) averaged 26%, and that for low molecular weight PAHs (NaP, AcPy, Acp, Flu, PA and Ant) were below 5%.