本研究針對S廠及C廠二座都市垃圾焚化廠分別進行煙道廢氣中戴奧辛/呋喃之檢測，以期能持續更廣泛建立本土之PCDD/Fs排放源資料庫，以利PCDD/Fs排放源之鑑定。此外，研究中試圖藉由加入天然有機抗氧化酵素來瞭解酵素對PCDD/Fs的減量效果。
　　所得結論歸納如下：1. S廠與C廠於一般正常操作情況下所進行之煙道廢氣PCDD/Fs採樣， PCDD/Fs濃度平均值分別0.789 ng/Nm3及5.36ng/Nm3；總I-TEQ 則分別為0.0408及0.179 ng-I-TEQ/Nm3。2.S焚化廠啟爐時，其煙道廢氣中總PCDD/Fs濃度平均為385 ng/Nm3，而總PCDD/Fs I-TEQ濃度值平均值為13.8 ng I-TEQ/Nm3。起爐期間煙道廢氣PCDD/Fs之排放量為35.2 mg I-TEQ，約為整年正常操作PCDD/Fs排放量之40.5％。3. S焚化廠袋式集塵器對總PCDD/Fs及總I-TEQ之平均去除效率皆為99.8％; C焚化廠袋式集塵器對總PCDD/Fs及總I-TEQ之去除效率分別為-652％及-340％，推測與記憶效應(memory effect)有關。在更新袋式集塵器之濾袋後，袋式集塵器對總PCDD/Fs及總I-TEQ之去除效率分別為39.2％及70.9％。4.於抗氧化酵素噴灑期間，S焚化廠煙道廢氣PCDD/Fs濃度呈現下降之趨勢，煙道廢氣PCDD/Fs濃度值於檢測期間達開廠至今之極低值（分別為0.0169 與0.0171 ng I-TEQ/Nm3），且抗氧化酵素噴灑期間五組煙道廢氣PCDD/Fs濃度值不像之前之檢測數據彼此差異較大。整體而言，噴灑抗氧化酵素對S焚化廠煙道廢氣PCDD/Fs之減量效果明顯。

　　This study investigates the characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the stack flue gases of municipal solid waste incinerators (MSWIs) S and C to evaluate the influence of MSWIs and establish a native PCDD/F database. Additionally, reducing the PCDD/F emission from the stack flue gas by adding antioxidation enzyme is also investigated.
　　The conclusions of this study are summarized as follows: First, at steady operation, the mean PCDD/F concentrations in the stack flue gases of MSWI S and C are 0.0408 and 0.179 ng I-TEQ/Nm3, respectively. Secondly, in start-up of the MSWI-S, the mean PCDD/F concentrations in the stack flue gas is 13.8 ng I-TEQ/Nm3 and a total of 35.2 mg I-TEQ of PCDD/Fs was estimated in the start-up period. The PCDD/F emission in start-up equals 40.5% of one year emissions in steady operation. Thirdly, the PCDD/F removal efficiency by bag filters of MSWI-S and MSWI-C were 99.8％ and -340％, respectively. The negative PCDD/F removal efficiency of MSWI-C may be owing to the memory effect. After replacing filters, the PCDD/F removal efficiency reached 70.9％. Finally, after spraying antioxidation enzyme, the PCDD/F concentration in the stack flue gases of MSWI-S is declined, and reaches the lowest point since MSWI-S started operation. In addition, the five PCDD/F concentrations of one stack flue gas sampling have less deviation than former data. In summary, the effect of spraying antioxidation enzyme on the PCDD/F concentration in the stack flue gases of MSWI-S is obvious.

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