Determination of Calorific Value in Sludge by Oxygen Bomb Automatic Calorimeter.

In this study, the detection method of caloric value in sludge was established using oxygen bomb automatic calorimeter based on the optimized experimental factors which included drying temperature, drying time, sample weighing amount and combustion supporting material adding amount of sludge sample. Moreover,the difficulty of low caloric value in sludge samp! was also solved. The study shows that accurate and stabe resutts are acquired when the ground sludge sample was fully burned in an oxygen bomb filed with 3.0 MPa oxygen after the drying process of wet sludge. Furthermore, for the detecion of the calorfc value in sludge sampels lower than 7.0 MJ/kg,the accurate results could be obtained wth the add-on of 0. 2 g benzoic acid reference material for the assist of combusion. [ABSTRACT FROM AUTHOR]