Abstract
Research and experimental studies were carried out in relation to reduction of hazardous elements contained in sewage sludge incineration ash. A questionnaire survey was conducted in 69 Japanese municipalities with sewage sludge incineration facilities. Selenium content in bag filter ash and ceramic filter ash was relatively higher than that in ash of cyclone and electrostatic precipitators. It was assumed that selenium vaporized in the furnace was due to adsorb in the fly ash on filter when passing through the low-temperature filter. To reduce high boiling point heavy metals in the ash, sewage sludge and incineration ash were heated up using a small muffle furnace. As the result, the chrome and nickel contents were reduced. A decrease in the surface area of ash and the reduction of elements occurred at the same time in sewage sludge and incineration ashes tested in this study.
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Acknowledgments
This work was performed by fund of Ministry of Agriculture, Forestry and Fisheries of Japan “Research and development projects for application in promoting new policy of agriculture, forestry and fisheries (No. 23012)” and Management Expenses Grants of Incorporated Administrative Agency Public Works Research Institute.
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Inoue, K., Uchida, T. Reduction of hazardous elements contained in sewage sludge incineration ash. J Mater Cycles Waste Manag 19, 1488–1494 (2017). https://doi.org/10.1007/s10163-016-0520-1
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DOI: https://doi.org/10.1007/s10163-016-0520-1