Investigation of Pyrolysis Behavior of Sewage Sludge by Thermogravimetric Analysis Coupled with Fourier Transform Infrared Spectrometry Using Different Heating Rates

In this study, pyrolysis of municipal sewage sludge samples from different sources including cattle and chicken manure as well brook mud, was investigated using a thermogravimetric analysis coupled with Fourier transform infrared spectrometer (TG-FTIR) at heating rates (25, 50 100 °C/min). order to determine the kinetic parameters, Arrhenius, model-free Kissinger–Akira–Sunose (KAS), Friedman Flynn–Wall–Ozawa (FWO) methods were compared. The results revealed that involved stages, main decomposition reactions took place in range 200–600 °C. range, biodegradable components (e.g., lipids polysaccharides), proteins carbohydrates occurred; meanwhile, there manure, mud) which step could be observed even temperatures above 700 According Arrhenius method, activation energies first stage between 25.6 85.4 kJ/mol, while second third stages ranges 11.4–36.3 kJ/mol 20.2–135 respectively. also calculated by KAS, FWO methods, 100–300 for or distillery sludge, ranged 9.6 240 mud samples.