An investigation on the potential of metal recovery from the municipal waste incinerator in Taiwan.
This study aimed to identify distribution of metals and to estimate the amount of these metals that can be potentially recovered from incineration residues. First, the partitioning behavior of Cr, Cu, Fe, Cd, Al, Zn, and Pb in bottom ash and fly ash was investigated in one large municipal waste incinerator in Taiwan. In addition, the material flow analysis (MFA) method was used to estimate the material flux of metals within incinerator plant, and to calculate the amount of metal recovery. According to the findings of this study, six metals (Fe, Al, Cu, Zn, Cr, and Pb) concentrated in bottom ash mostly, while Cd existed primarily in fly ash. The weight percentages of Fe (4.49%), Al (5.24%), Cu (1.29%), Zn (2.21%), and Pb (0.58%) in incinerator ash are high, and even higher than the compositions of natural minerals. Finally, the amount of Cr, Cu, Fe, Cd, Al, Zn and Pb that can be potentially recovered from incineration residues will reach 2.69 x 10(2), 1.46 x 10(4), 4.91 x 10(4), 6.92 x 10(1), 5.10 x 10(4), 1.85 x 10(4) and 4.66 x 10(3) ton/yr, respectively.
Kuo
Nae-Wen
NW
Graduate Institute of Tourism and Health Science, National Taipei College of Nursing, P.O. Box 22-96, Taipei 10699, Taiwan. ibis@ntcn.edu.tw
Ma
Hwong-Wen
HW
Yang
Ya-Mei
YM
Hsiao
Teng-Yuan
TY
Huang
Chin-Ming
CM
D002244:Carbon / Q000737:chemistry; D002947:Cities; D060729:Coal Ash; D003247:Conservation of Natural Resources; D052918:Environmental Restoration and Remediation / Q000379:methods*; D017745:Incineration / Q000295:instrumentation*; D008670:Metals / Q000032:analysis / Q000302:isolation & purification*; D052638:Particulate Matter / Q000737:chemistry; D012037:Refuse Disposal / Q000295:instrumentation*; D012722:Sewage / Q000737:chemistry; D013624:Taiwan
D060729:Coal Ash; D008670:Metals; D052638:Particulate Matter; D012722:Sewage; D002244:Carbon