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ȯ°æºÐ¼®ÇÐȸÁö 'ȯ°æºÐ¼®°ú µ¶¼ºº¸°Ç(ISSN 2672-0175, eISSN 2672-1139)'Àº ȯ°æµ¶¼ºº¸°ÇÇÐȸ¿Í °øµ¿À¸·Î ¹ß°£Çϸç,
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- 2085
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Analysis of Physicochemical Characteristics of Bottom Ashes from Municipal Solid Waste Incinerator
Jung-Hwan Kim¡¤Kyung-Sun Yoo* and Nam-Chan Kim*
Kyonggi Credit Guarantee Foundation¡¤*Dept. of Environ. Eng., Kwangwoon University
Wolgye-dong 447-1, Nowon-gu, Seoul, 139-701, KOREA
ABSTRACT
The future waste management shifts from a sanitary landfill to an incineration and a subsequent landfill. It is expected the landfill will be changed from the mixed landfill to the landfill for incinerated ashes only. The objective of this study was to characterize the physicochemical properties of the ash landfill. The ash samples were taken from three incineration facilities in Seoul and Kyonggi Province. The main tasks of this study were soil mechanics experiments, element analysis and ignition loss measurements. The mean specific gravity of bottom ashes was 2.44. The bottom ashes were well graded. The optimum water content of bottom ashes was 0.177¡0.204. The maximum dry density was 1.81¡1.94 g/cm3. According to consolidation tests, the consolidation coefficient was not available with ¡ît or log t method since there was no significant subsidence. The hydraulic conductivity with 20 blows was 5¡¿10-3¡1.3¡¿10-4 cm/s. The ignition loss was 16.3¡20.2%. The element analysis showed 0.075¡0.015% N, 3.00¡4.86% C, 0.20¡0.37% H and no S.
Key Words : Soil Mechanics, Bottom Ash, Consolidation Test, Hydrauric Conductivity
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