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Thermal Analysis of Municipal Sludge Waste Combustion

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Abstract:

Municipal sludge waste combustion was studied by thermogravimetry (TG) and differential thermal analysis (DTA), to better understand the two main stages which occur during the combustion process, and to evaluate how much of the total and significant generated heat is released is during each combustion stage. A method to measure the lower heating value (LHV) on a dried basis was developed from the TG/DTA data and it was applied to the whole process and to each combustion stage. Chemical analysis of the residual products after each step shows that nitrogen organic compounds are burnt only from 350°C to 550°C, and that the organics which are released and burnt in the previous step, which begins by 150°C, present a heating value of about 32MJ/kg. The nitrogen containing compounds present a lower LHV.

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Periodical:

Materials Science Forum (Volumes 530-531)

Pages:

740-746

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.530-531.740

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Online since:

November 2006

Authors:

Jo Dweck, L.C. Morais, J.C. Meneses, Pedro M. Büchler

Keywords:

Combustion, Differential Thermal Analysis (DTA), Lower Heating Value, Sludge Waste, TG

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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