A comparison of isothermal with nonisothermal drying kinetics of municipal sewage sludge
A comparison of isothermal with nonisothermal drying kinetics of municipal sewage sludge
复制标题
城市污水污泥等温与非等温干燥动力学的比较
DOI：
10.1007/s10973-015-4933-1
复制
发表时间：
2016-01-01
影响因子：
4.4
通讯作者：
Chen, M. Q.
中科院分区：
文献类型：
--
作者：
Zhang, X. Y.;Chen, M. Q.
采用热分析技术，研究了城市污水污泥在等温和非等温干燥条件下在氮气气氛中的热干燥行为。在预测等温和非等温干燥行为时，Midilli模型最适合于预测最高str2污泥的干燥行为。第一下降速率周期和第二下降速率周期的等温干燥表观活化能分别为18.03和11.87 kJ mol−1。污泥非等温干燥表观活化能在第一个下降速率周期为33.61 ~ 47.37 kJ mol−1，在第二个下降速率周期为20.47 ~ 33.43 kJ mol−1。在两个下降速率周期内，等温干燥的主导机制作用是相同的。用和分别描述了非等温干燥过程中第一下降速率期和第二下降速率期的主导机制作用。
Thermal drying behavior of the municipal sewage sludge in nitrogen atmosphere was explored using a thermal analysis technique under isothermal and nonisothermal drying conditions. The Midilli model,, was the best suitable for predicting both the isothermal and nonisothermal drying behavior of the sewage sludge with the highestR2. The isothermal drying apparent activation energies of the first falling rate period and the second falling rate period were 18.03 and 11.87 kJ mol−1, respectively. The nonisothermal drying apparent activation energies of sewage sludge were from 33.61 to 47.37 kJ mol−1in the first falling rate period and from 20.47 to 33.43 kJ mol−1in the second falling rate period, respectively. In two falling rate periods, the dominant mechanism functions for the isothermal drying were identical,. The dominant mechanism functions for the first falling rate period and the second falling rate period in the nonisothermal drying were described byand, respectively.