Combustion Melting Characterisation of Solid Fuel Obtained from Sewage Sludge

Dongju Kim, Dong-kyoo Park, Yong-taek Lim, Soo-nam Park, Yeong-Su Park and Kyunghyun Kim
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Dongju Kim: Plant Engineering Center, Institute for Advanced Engineering, Yongin 17180, Korea
Dong-kyoo Park: Plant Engineering Center, Institute for Advanced Engineering, Yongin 17180, Korea
Yong-taek Lim: Plant Engineering Center, Institute for Advanced Engineering, Yongin 17180, Korea
Soo-nam Park: Plant Engineering Center, Institute for Advanced Engineering, Yongin 17180, Korea
Yeong-Su Park: Plant Engineering Center, Institute for Advanced Engineering, Yongin 17180, Korea
Kyunghyun Kim: Department of Research Institute, Jinenertech Co., Ltd., Cheongyang 33317, Korea

Energies, 2021, vol. 14, issue 4, 1-18

Abstract: Solid fuelization technology can increase the heating value of sewage sludge such that it can be utilised as a fossil fuel substitutes. Reducing landfilling of bottom and fly ash resulting from heavy metals contained in sewage sludge is challenging. Hence, combustion melting technology (CMT), which can discharge bottom ash in the form of slag, has been proposed herein as an alternative to the conventional incineration technology. However, further research is required to improve the flowability of slag. Applicability of CMT for the stable treatment of heavy metals in the ash generated during the energisation of sewage sludge solid fuel has been reviewed. The change in the degree of fluidity was identified via a laboratory-scale fluidity measurement experiment following changes in melting temperature, mixing ratio of sewage sludge and sawdust, and basicity. The pouring index (PI) of sewage sludge solid fuel (pellet) was maintained at a level of about 60% at a basicity index of 0.8. Based on the results, the slagging rates and volume reduction rates, exhaust gas analysis, and heavy metal elution characteristics under oxygen enrichment were derived from a 2 ton/day combustion melting pilot plant experiment; thereafter, the feasibility of combustion melting of sewage sludge solid fuel was determined.

Keywords: sewage sludge; slagging; pouring index; fluidity; basicity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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