Heat supply from municipal solid waste incineration plants in Japan: Current situation and future challenges

This mini-review article summarizes the available technologies for the recycling of heavy metals (HMs) in municipal solid waste incineration (MSWI) fly ash (FA). Recovery technologies included thermal separation (TS), chemical extraction (CE), bioleaching, and electrochemical processes. The reaction conditions of various methods, the efficiency of recovering HMs from MSWI FA and the difficulties and solutions in the process of technical development were studied. Evaluation of each process has also been done to determine the best HM recycling method and future challenges. Results showed that while bioleaching had minimal environmental impact, the process was time-consuming. TS and CE were the most mature technologies, but the former process was not cost-effective. Overall, it has the greatest economic potential to recover metals by CE with scrubber liquid produced by a wet air pollution control system. An electrochemical process or solvent extraction could then be applied to recover HMs from the enriched leachate. Ongoing development of TS and bioleaching technologies could reduce the treatment cost or time.

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The estimation of N2O emissions from municipal solid waste incineration facilities: The Korea case

Waste Management ◽

10.1016/j.wasman.2011.03.010 ◽

2011 ◽

Vol 31 (8) ◽

pp. 1765-1771 ◽

Cited By ~ 14

Author(s):

Sangwon Park ◽

Jun-Ho Choi ◽

Jinwon Park

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Waste Incineration ◽

N2o Emissions ◽

Municipal Solid Waste Incineration

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Comparison of trace element mobility from MSWI ash before and after plasma vitrification

Waste Management & Research ◽

10.1177/0734242x211011543 ◽

2021 ◽

pp. 0734242X2110115

Author(s):

Wesley N Oehmig ◽

Justin Roessler ◽

Abdul Mulla Saleh ◽

Kyle A Clavier ◽

Christopher C Ferraro ◽

...

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Waste Incineration ◽

Waste To Energy ◽

Air Pollution Control ◽

Plasma Arc ◽

Municipal Solid Waste Incineration ◽

Trace Element Mobility ◽

Before And After ◽

Air Pollution Control Residues

A common perception of plasma arc treatment systems for municipal solid waste incineration ash is that the resulting vitrified slag is inert from an environmental perspective. Research was conducted to examine this hypothesis and to assess whether reduced pollutant release results from pollutant depletion during the process of the ash with plasma, or encapsulation in the glassy vitrified matrix. The concentrations of four discrete municipal solid waste incineration ash samples before and after plasma arc vitrification in a bench-scale unit were compared. Slag and untreated ash samples were leached using several standardized approaches and mobility among the four metals of interest (e.g. As, Cd, Pb and Sb) varied across samples, but was generally high (as high as 100% for Cd). Comparison across methods did not indicate substantial encapsulation in the vitrified slag, which suggests that reduced pollutant release from plasma arc vitrified slag is due to pollutant depletion by volatilization, not encapsulation. This has significant implications for the management of air pollution control residues from waste-to-energy facilities using plasma arc vitrification.

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