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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/5797

    Title: Emissions of polycyclic aromatic hydrocarbons from fluidized and fixed bed incinerators disposing petrochemical industrial biological sludge
    Authors: Lin-ChiWan
    Long-Full Lin(林龍富)
    Soon-Onn Lai
    Keywords: Polycyclic aromatic hydrocarbon
    Fluidized bed incinerator
    Fixed bed incinerator
    Carcinogenic potency
    Removal efficiency
    Date: 2009
    Issue Date: 2009-11-18 09:31:35 (UTC+8)
    Abstract: This study investigated the emissions of polycyclic aromatic hydrocarbons (PAHs) from two fluidized
    bed incinerators (FLBI A and FLBI B) and one fixed bed incinerator (FIBI) disposing biological sludge
    generated from the petrochemical industries in Taiwan. The results of 21 individual PAHs (including
    low (LM-PAHs), middle (MM-PAHs) and high molecular weight PAHs (HM-PAHs)) were reported. The
    LM-PAHs mainly dominated the total-PAHs in the stack flue gases, whereas the LM- and HM-PAHs dominated
    the total-PAHs in the bottom fly, fly ash and WSB effluent. Due to high carcinogenic potencies
    (= total-BaPeq concentrations) in the bottom ash (195 ng g−1) andWSB effluent (20,600 ng L−1) of the FIBI,
    cautious should be taken in treating them to avoid second contamination. Lower combustion efficiency
    and elevated fuel/feedstock (F/W) ratio for the FIBI led to the highest total emission factor of total-PAHs
    (38,400gkg−1). Lower total-PAH removal efficiencies of wet scrubber (WSB) (0.837–5.89%), cyclone
    (0.109–0.255%) and electrostatic precipitator (ESP) (0.032%) than those reported elsewhere resulted in
    high fraction in PAHcontributions fromthe stack flue gases. Lower total-PAHemission factorwas found for
    FLBI A (2380gkg−1 biological sludge) with higher combustion efficiency compared to those for FLBI B
    (11,500gkg−1) and FIBI (38,400gkg−1 biological sludge), implying that combustion efficiency plays a
    vital role in PAH emissions.
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