Thermodynamics and kinetics of sewage sludge (SS) and water hyacinth (WH) co-combustion as a blend fuel (SW) for bioenergy production were studied through thermogravimetric analysis. In CO2/O-2 atmosphere, the combustion performance of SS added with 10-40 wt.% WH was improved 1-1.97 times as revealed by the comprehensive combustion characteristic index (CCI). The conversion of SW in different atmospheres was identified and their thermodynamic parameters (Delta H, Delta S, Delta G) were obtained. As the oxygen concentration increased from 20% to 70%, the ignition temperature of SW decreased from 243.1 degrees C to 240.3 degrees C, and the maximum weight loss rate and CCI increased from 5.70%.min(-1) to 7.26%.min(-1) and from 4.913%(2).K-3.min(-2) to 6.327%(2) K-3.min(-2), respectively, which corresponded to the variation in Delta S and Delta G. The lowest activation energy (E-a) of SW was obtained in CO2/O-2 = 7/3 atmosphere. (C) 2016 Elsevier Ltd. All rights reserved.