Kinetic study of accelerated carbonation of municipal solid waste incinerator air pollution control residues for sequestration of flue gas CO2

2008 ◽  
Vol 1 (3) ◽  
pp. 370 ◽  
Author(s):  
Jia Sun ◽  
Marta Fernández Bertos ◽  
Stefaan J. R. Simons
Keyword(s):  
Air Pollution ◽  
Kinetic Study ◽  
Flue Gas ◽  
Pollution Control ◽  
Waste Incinerator ◽  
Municipal Solid Waste Incinerator ◽  
Air Pollution Control ◽  
Accelerated Carbonation ◽  
Air Pollution Control Residues ◽  
Solid Waste Incinerator

scholarly journals Impact of diatomite addition on lead immobilization in air pollution control residues from a municipal solid waste incinerator

2021 ◽  
Author(s):  
Hiroki Kitamura ◽  
Masato Ueshima ◽  
Seungki Back ◽  
Noppharit Sutthasil ◽  
Hirofumi Sakanakura ◽  
...  
Keyword(s):  
Air Pollution ◽  
Municipal Solid Waste ◽  
Toxic Metals ◽  
Pollution Control ◽  
Waste Incinerator ◽  
Municipal Solid Waste Incinerator ◽  
Air Pollution Control ◽  
Pozzolanic Material ◽  
Apc Residues ◽  
Solid Waste Incinerator

AbstractAir pollution control (APC) residues, which are known to be the byproducts of incineration treatment, exhibit a high leaching potential of toxic metals. Calcium silicate hydrate (C-S–H), which is a major hydration product of hardened cement and immobilizes toxic metal, can be formed by the reaction of Ca with pozzolanic Si in a highly alkaline environment. Toxic metals might be immobilized by the addition of pozzolanic material to APC residues (instead of using cement), which is a Ca source and provides an alkaline condition. In this study, diatomite, which mainly comprises amorphous silica (SiO2·nH2O), was investigated as a pozzolanic material for Pb immobilization in APC residues obtained from a municipal solid waste incinerator. APC residues were cured with and without the addition of diatomite at different temperatures. When diatomite was added to APC residues, pozzolanic phases such as C-S–H gel were formed via the consumption of Ca(OH)2 and CaClOH. Compared to APC residues cured without diatomite, the leaching of Pb decreased by 99% for APC residues cured for 14 days with 10% diatomite at 70 °C. The results of sequential chemical extraction showed that water-soluble Pb in APC residues was reduced from 10.3% to nearly zero by the pozzolanic reaction. Consequently, the leaching amount of Pb dropped below 0.3 mg/L (Japanese criteria for landfill disposal). Overall, these experiments provide promising results regarding the possibility of using diatomite for pretreating APC residues.

A full-scale study on thermal degradation of polychlorinated dibenzo-p-dioxins and dibenzofurans in municipal solid waste incinerator fly ash and its secondary air pollution control in China

2016 ◽  
Vol 35 (4) ◽  
pp. 437-443 ◽  
Author(s):  
Xingbao Gao ◽  
Bingjing Ji ◽  
Dahai Yan ◽  
Qifei Huang ◽  
Xuemei Zhu
Keyword(s):  
Air Pollution ◽  
Fly Ash ◽  
Thermal Degradation ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Waste Incinerator ◽  
Municipal Solid Waste Incinerator ◽  
Air Pollution Control ◽  
Secondary Air ◽  
Solid Waste Incinerator

Degradation of polychlorinated dibenzo- p-dioxins and dibenzofurans in municipal solid waste incinerator fly ash is beneficial to its risk control. Fly ash was treated in a full-scale thermal degradation system (capacity 1 t d−1) to remove polychlorinated dibenzo- p-dioxins and dibenzofurans. Apart from the confirmation of the polychlorinated dibenzo- p-dioxin and dibenzofuran decomposition efficiency, we focused on two major issues that are the major obstacles for commercialising this decomposition technology in China, desorption and regeneration of dioxins and control of secondary air pollution. The toxic equivalent quantity values of polychlorinated dibenzo- p-dioxins and dibenzofurans decreased to <6 ng kg−1 and the detoxification rate was ⩾97% after treatment for 1 h at 400 °C under oxygen-deficient conditions. About 8.49% of the polychlorinated dibenzo- p-dioxins and dibenzofurans in toxic equivalent quantity (TEQ) of the original fly ash were desorbed or regenerated. The extreme high polychlorinated dibenzo- p-dioxin and dibenzofuran levels and dibenzo- p-dioxin and dibenzofuran congener profiles in the dust of the flue gas showed that desorption was the main reason, rather than de novo synthesis of polychlorinated dibenzo- p-dioxins and dibenzofurans in the exhaust pipe. Degradation furnace flue gas was introduced to the municipal solid waste incinerator economiser, and then co-processed in the air pollution control system. The degradation furnace released relatively large amounts of cadmium, lead and polychlorinated dibenzo- p-dioxins and dibenzofurans compared with the municipal solid waste incinerator, but the amounts emitted to the atmosphere did not exceed the Chinese national emission limits. Thermal degradation can therefore be used as a polychlorinated dibenzo- p-dioxin and dibenzofuran abatement method for municipal solid waste incinerator source in China.

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