Thermal treatment of the fly ash from municipal solid waste incinerator with rotary kiln

Journal of Hazardous Materials
Ming-Yen WeyJing-Tong Chou

Abstract

Reuse of the fly ash from the municipal solid waste incinerator (MSWI) is a policy of Taiwan EPA. However, the fly ash is often classified as a hazardous waste and cannot be reused directly because the concentrations of heavy metals exceed the TCLP regulations. The main objective of this study is to investigate the continuous sintering behavior of fly ash with a rotary kiln and seek a solution to reduce the concentrations of heavy metal to an acceptable value. The partitions of the heavy metals in the process are also considered. The results of TCLP showed that among the metals of Cr, Cd, Cu and Pb, only the concentrations of Pb in raw fly ash exceeded the regulation. At sintering temperatures of 700, 800 and 900 degrees C, the concentration of Pb decreased in sintering products, however, the concentration of Pb still exceeded the limitation at 700 and 800 degrees C. Additionally, the water-washing was used to pre-treat the fly ash before sintering process. The washing treatment effectively reduced the leaching concentrations of Pb to agree the regulations. Therefore, water-washing followed by a sintering treatment is an available process for detoxifying the fly ash of MSWI.

Citations

Apr 24, 2012·Environmental Technology·Jing-Dong ChouShih-Hsien Chang
Jun 25, 2008·Journal of Hazardous Materials·Kuen-Sheng WangChing-Hwa Lee
Nov 27, 2007·Waste Management·Margarida J QuinaRosa M Quinta-Ferreira
May 1, 2007·Journal of Hazardous Materials·S RioP Sharrock
Jan 17, 2015·Waste Management·Daniel LindbergMikko Hupa
Jul 12, 2016·Journal of Hazardous Materials·Nan YeXu Wu
May 25, 2007·Journal of Hazardous Materials·Jing-Dong ChouShih-Hsien Chang
May 12, 2015·International Journal of Environmental Research and Public Health·Na Wei
Jun 13, 2017·International Journal of Environmental Research and Public Health·Bing GongWeizhong Yang
Feb 20, 2018·Environmental Science and Pollution Research International·Zhenzhou YangZuotai Zhang
May 2, 2019·Environmental Science and Pollution Research International·Zhenghui PhuaWun Jern Ng
Jul 20, 2018·Environmental Science and Pollution Research International·Jin-Zhong YangQifei Huang

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