剩余污泥超声破解性能研究

采用超声波技术破解人工配水条件下培养的污泥，研究了超声破解含固率为0．5％与1％污泥的性能，并比较了超声破解2种含固率污泥的效果。结果表明，在一定声能密度下，SCOD增加值随时间延长线性增长。即在一定试验时间范围内，污泥破解反应相对于时间符合一级反应动力学规律。但是，在较高声能密度与较低污泥浓度下，SCOD增加值随时间延长不再呈线性增长趋势，而是随超声作用时间的延长，增长速度减缓。在相同比能耗下，破解含固率为1％污泥的SCOD增加值明显大于含固率为0．5％污泥值。若后续污泥处理工艺采用厌氧消化技术，则推荐破解含固率为1％的污泥。超声破解污泥后，污泥温度会升高，相同声能密度下，破解两种不同含固率污泥的温度升高值相近。

Disintegration of Waste Activated Sludge by Ultrasonic Treatment

In this paper, pretreatment of waste sludge by ultrasonic disintegration at a laboratory- scale is studied. The sludge disintegrated was cultivated using a synthetic water. This study included the following: the effects of ultrasonic disintegration on sludge with both concentrations of 0.5% and 1% ; respectively, compared with another two tests. It has been found that under certain ultrasonic density and ultrasonic intensity, the quantity of soluble COD (SCOD) raised linearly as the time extends. However, when the ultrasonic intensity was high and the sludge density was low, while the rising rate became slowly. Under the same specific energy, the quantity of SCOD of disintegration for 1% was much larger than that for 0.5% . It may be concluded that anaerobic digestion may be applied as the subsequent process, the sludge concentration of 1% was selected for disintegration. The temperature of sludge enhanced after disintegration under the same ultrasonic intensity, with an appropriate values.