中文摘要：

文章从静态和动态研究了剩余活性污泥的超声脱水及污泥的破解。静态下，污泥的脱水应在低功率（以50W为例）短时间（7min）内进行，最高的脱水率（相对于未超声而言）可增加近16％；污泥破解应在高功率长时间下进行．本实验在250W的功率下连续处理20min，COD的增加值达到近1600mg／L；污泥的破解满足一级反应动力学。动态下，以低功率（50W）为例，脱水及破解曲线都比较平坦，污泥的总脱水率相对于未超声而言增加可达近23％；COD的增加值近似达1800mg／L。通过比较低功率下实验，动态实验效果明显优于静态实验。

英文摘要：

In the paper, dewatering and disintegration of residual activated sludge are investigated by ultrasound in static and dynamic case. In static case, sludge dewatering is carried at low electric power（50W） and short time（7min）. The best dewatering is increased 16%（compared with without ultrasound）. Disintegration of sludge should be treated at high electric power and long time. In experiments, the sludge is treated continuously for 20min at 250W. Increasing value of COD is about 1600mg/L The sludge disintegration follows pseudo-first-order reaction kinetic law. In dynamic case, at low electric power for example 50W. The curve of dewatering and disintegration of sludge are rather flattening, the total dewatering rate is increased about 23% compared with without ultrasound. The increasing value of COD is about 1 800mg/L. The dynamic experiment result is markedly better than the static result by compared at low electric power（50W）.