Effects of Incinerator Exhaust Gas Treatment Agents and Fly Ash Processing Chelates on MSW Landfill Management

Abstract:

Lime used to treat flue gas from incinerators and organic chelating agents used to remove heavy metals from fly ash create a highly saline and alkaline environment at landfill sites, causing nitrification inhibition that hampers nitrogen treatment and generating refractory COD in the processes of organic stabilization by microbes and leachate treatment. The authors analyzed organic chelating agents and fly ash treated with the chelating agents, and monitored leachate from lysimeters, or simulated landfills. The results showed that organic chelating agents acted as nitrification inhibitors, and that higher water levels in landfill layers resulted in higher concentrations of thiourea and refractory COD, which are chelating compounds, hindering leachate treatment.

• Periodical: Applied Mechanics and Materials (Volume 768)
• Pages: 233-239
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.768.233
• Online since: June 2015
• Authors: Yu Lin Song*, Masanobu Uchida, Sotaro Higuchi
• Keywords: Chelating Agent, COD, Fly Ash, Nitrogen

References

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[6] Yulin SONG, Ruiming CHEN, Masanobu UCHIDA, Sotaro HIGUCHI, Effects of incinerator exhaust gas treatment agents and fly ash processing chelates on MSW landfill management (in Japanese)., The 25th Annual Conference of the Japan Society of Material Cycles and Waste Management, pp.431-432, (2014).

DOI: 10.4028/www.scientific.net/amm.768.233