湿式氧化处理剩余污泥反应动力学研究

针对剩余污泥湿式氧化处理过程。以污泥中挥发分的去除为目标污染物，进行了化工废水剩余污泥．炼油废水剩余污泥湿式氧化过程动力学研究，并对湿式氧化两阶段一级动力学模型和广义动力学模型的动力学进行求解。两阶段一级动力学模型说明化工污泥．炼油污泥湿式氧化过程均属于快速反应期接慢速反应期。但不同污泥其活化能和指前因子相差较大：而用广义动力学模型可以建立通用的剩余污泥湿式氧化反应速率方程，该模型应用于城市废水剩余污泥湿式氧化过程，计算值与试验值有很好的相关性（P^2≥0．98）。

A Study on Kinetic Model of Waste Sludge Treatment by Wet Air Oxidation

Taking MLVSS/MLSS as a target pollutant, the two-step first-order reaction kinetic model and the generalized kinetic model were employed to simulate the wet air oxidation (WAO) process of waste sludge. By applying the two-step first-order reaction kinetic model to associated experimental data, the WAO process of waste sludge was found to follow the slow-reaction phase after fast-reaction phase in spite of waste sludge from petrochemical wastewater treatment plant or refinery oil wastewater treatment plant, but activation energy and the pre-exponential factor were quite different by different waste sludge. However, the generalized kinetic model was relatively adequate to evaluate the WAO process of waste sludge, and the general reaction equation has been established. This equation was suitable to simulate the WAO process of municipal waste sludge, and the correlation coefficients (R~2) between concentration profiles and experimental data were more than 0.98.