Abstract
Thermogravimetric (TG) analysis was used to investigate the effects of carbonization and solvent extraction on the combustion characteristics of sewage sludge. Initial temperature (IT) and peak temperature (PT) represent combustion characteristics in carbonized sludge (CS). The sludge extracted (ECS) from CS using solvent extraction exhibited higher IT and PT than raw sludge (RS). First, indicate that carbonization was carried out at two different temperatures, 300 and 400 C, to produce CS300 and CS400; then, compare the corresponding IT and burnout temperature (BT). All IT and PT values for ECS300 were lower than those values for RS and CS. The activation energy determined for the combustions of CS300 and ECS300 was lower than the one for the combustion of RS. The ECS300 activation energy (combustion zone of char) was determined to be 90.7 ~ 99.1 kJ/mol, lower to the range of 109.3 ~ 126.9 kJ/mol for coal.
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