School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 501640, China.
Waste Manag. 2012 Jun;32(6):1156-62. doi: 10.1016/j.wasman.2012.01.024. Epub 2012 Mar 2.
The input and output samples from existing large-scale municipal solid waste incinerator (MSWI) were collected and analyzed for polychlorinated dibenzo-р-dioxins and dibenzofurans (PCDD/Fs) in this study, aiming to evaluate PCDD/F characteristic and the corresponding mass balance through the whole system. The grate-type MSWI is equipped with semi-dry scrubber, activated carbon injection, and bag filter as air pollutant control devices (APCDs). Results showed that on the output side, the stack gas, bottom ash and fly ash presented their mean dioxin levels of 0.078 ng I-TEQ/Nm(3), 12.94 ng I-TEQ/kg and 858 ng I-TEQ/kg, respectively, and showed large similarities in congener profiles. Instead, on the input side, the municipal solid waste (MSW) presented a mean dioxin level of 15.56 ng I-TEQ/kg and a remarkable difference in congener profiles compared with those of the output. The dioxin mass balance demonstrated that the annual dioxin input value was around 5.38 g I-TEQ/yr, lower than the total output value (7.62 g I-TEQ/yr), signifying a positive dioxin balance of about 2.25 g I-TEQ/yr.
本研究收集并分析了现有大型城市生活垃圾焚烧炉（MSWI）的输入和输出样本，旨在通过整个系统评估 PCDD/F 的特征和相应的质量平衡。该炉排式 MSWI 配备了半干法洗涤器、活性炭喷射和袋式过滤器作为空气污染物控制设备（APCDs）。结果表明，在输出端，烟囱气、底灰和飞灰的二恶英水平平均值分别为 0.078ng I-TEQ/Nm(3)、12.94ng I-TEQ/kg 和 858ng I-TEQ/kg，且同系物分布相似。相比之下，在输入端，城市固体废物（MSW）的二恶英水平平均值为 15.56ng I-TEQ/kg，与输出端的二恶英水平平均值相比存在显著差异。二恶英质量平衡表明，每年的二恶英输入值约为 5.38g I-TEQ/yr，低于总输出值（7.62g I-TEQ/yr），表明每年约有 2.25g I-TEQ 的正二恶英平衡。
