Journal
WASTE MANAGEMENT
Volume 32, Issue 3, Pages 561-567Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2011.10.032
Keywords
Co-incineration; Semi-dried sewage sludge; Municipal solid waste; Computational fluid dynamics
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Funding
- National Basic Research Program of China (973 Program) [2011CB201500]
- Guangdong Key Laboratory of Clean Energy Technology [2008A060301002]
- Guangzhou Major Scientific Research Projects [X2DLB2080500]
- Key Laboratory of Efficient and Clean Energy Utilization of Guangdong Higher Education Institutes [KLB10004]
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Incineration is one of the most important methods in the resource recovery disposal of sewage sludge. The combustion characteristics of sewage sludge and an increasing number of municipal solid waste (MSW) incineration plants provide the possibility of co-incineration of sludge with MSW. Computational fluid dynamics (CFD) analysis was used to verify the feasibility of co-incineration of sludge with MSW, and predict the effect of co-incineration. In this study, wet sludge and semi-dried sludge were separately blended with MSW as mixed fuels, which were at a co-incineration ratios of 5 wt.% (wet basis, the same below), 10 wt.%, 15 wt.%, 20 wt.% and 25 wt.%. The result indicates that co-incineration of 10 wt.% wet sludge with MSW can ensure the furnace temperature, the residence time and other vital items in allowable level, while 20 wt.% of semi-dried sludge can reach the same standards. With lower moisture content and higher low heating value (LHV), semi-dried sludge can be more appropriate in co-incineration with MSW in a grate furnace incinerator. (C) 2011 Elsevier Ltd. All rights reserved.
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