Jung C H, Matsuto T, Tanaka N, Okada T
Laboratory of Solid Waste Disposal Engineering, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan.
Waste Manag. 2004;24(4):381-91. doi: 10.1016/S0956-053X(03)00137-5.
This study aimed to identify distribution of metals and the influential factors on metal concentrations in incineration residues. Bottom ash and fly ash were sampled from 19 stoker and seven fluidized bed incinerators, which were selected to have a variety of furnace capacity, furnace temperature, and input waste. In the results, shredded bulky waste in input waste increased the concentration of some metals, such as Cd and Pb, and the effect was confirmed by analysis of shredded bulky waste. During MSW incineration, lithophilic metals such as Fe, Cu, Cr, and Al remained mainly in the bottom ash while Cd volatilized from the furnace and condensed to the fly ash. About two thirds of Pb and Zn was found in the bottom ash despite their high volatility. Finally, based on the results obtained in this study, the amount of metal in incineration residues of MSW was calculated and the loss of metal was estimated in terms of mass and money. A considerable amount of metal was found to be lost as waste material by landfilling of incineration residues.
本研究旨在确定焚烧残渣中金属的分布情况以及影响金属浓度的因素。从19台层燃炉和7台流化床焚烧炉中采集了底灰和飞灰，这些焚烧炉的选择考虑了不同的炉膛容量、炉温及输入废物等因素。结果表明，输入废物中的碎大件垃圾会增加某些金属（如镉和铅）的浓度，对碎大件垃圾的分析证实了这一影响。在城市生活垃圾焚烧过程中，亲石金属（如铁、铜、铬和铝）主要残留在底灰中，而镉则从炉膛挥发并凝结到飞灰中。尽管铅和锌挥发性较高，但约三分之二的铅和锌存在于底灰中。最后，根据本研究获得的结果，计算了城市生活垃圾焚烧残渣中的金属含量，并从质量和金钱方面估算了金属的损失。研究发现，通过填埋焚烧残渣会导致大量金属作为废料流失。
