造纸污泥与污水污泥的表观干燥动力学研究

对污泥处理采用表观干燥动力学研究是具有重要的应用指导意义。通过对相同比表面积3.24 cm2/g的造纸污泥与污水污泥在4种不同的温度(30、70、102、130℃)条件下进行实验对比,并进行动力学方程拟合。结果表明:干燥速率常数k是污泥干燥动力学研究中一个重要参数,造纸污泥的干燥速率常数比污水污泥的大;造纸污泥与污水污泥的活化能分别为26.847和27.423 kJ/mol,污水污泥的活化能比造纸污泥活化能稍大,这与污水污泥粘性较大有关。

Study of the Apparent Drying Kinetics of Papermaking and Sewage Water Sludge

To study the apparent drying kinetics of sludge is of major significance for guiding sludge treatment.For this purpose,a contrast test of paper-making sludge and sewage water sludge with a same specific surface area of 3.24 cm~2/g at four temperatures(30℃,70℃,102℃ and 130℃) was performed and a fitting of the kinetic equation was conducted.It has been found that the drying rate constant k is an important parameter for studying the drying kinetics of sludge and the drying rate constant of the paper-making sludge is bigger than that of sewage water sludge.The activated energies of the paper-making and sewage water sludge are 26.84 kJ/mol and 27.423 kJ/mol respectively,indicating that the activated energy of the sewage water sludge is slightly bigger than that of the paper-making sludge.This depends on the fact that the viscosity of the sewage water sludge is comparatively big.