Title of article :
Thermal pyrolysis characteristics of polymer flocculated waste activated sludge
Author/Authors :
C. P. Chu، نويسنده , , D. J. Lee، نويسنده , , C. Y. Chang، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2001
Abstract :
Polyelectrolyte conditioning is a common practice in wastewater management. This paper experimentally elucidated the thermal pyrolysis characteristics of waste activated sludge at a temperature range of 300–900 K (27–627°C) using thermogravimetric analysis (TGA) in inert atmosphere, with especial attention on the effect of polyelectrolyte flocculation (using cationic polyacrylamide). On the pyrolysis rate vs temperature plot two maxima were noted. At the heating rate of 8°C/min, polyelectrolyte does not influence the pyrolysis process. As higher heating rates (14 and 20°C/min), on the other hand, flocculation to charge neutralization point would enhance the rate of thermal pyrolysis. A simple two parallel-reaction kinetic model is applied to interpret the experimental data. Possible roles of flocculant on sludge pyrolysis are discussed on the basis of change in sludge structures and the hindrance of surface reactions of sludge particles.
Keywords :
model , sludge , Pyrolysis , conditioning
Journal title :
Water Research
Journal title :
Water Research