高压喷射撞击流破解剩余污泥的研究

剩余污泥含有大量细菌、病毒和有机物，有可能造成二次污染.污泥破解有利于有机物的回收和有害物质的处理.研究了高压喷射撞击对污泥破解的作用.确定了撞击距离、撞击时间和撞击压力3个因素的最佳条件为:距离5cm，时间20~25min，压力13.79MPa.采用响应面法(response surface methodology，RSM)对破解效果和能耗进行了优化分析.以可溶性化学需氧量(soluble chemical oxygen demand，SCOD)的破解能耗比(disintegration energy ratio，DER)作为RSM的评价指标.考虑到破解效果和DER_SCOD，建议参数为距离5~6cm，时间15~20min，压力13.79MPa.该研究为污泥物理破解提供了新的思路.

Study on Excess Sludge Disintegration by High Pressure Jet Impingement Stream

Excess sludge is rich in bacteria， viruses， and organics matter， potentially causing secondary pollution. Sludge disintegration is beneficial to the recovery of organic matter and treatment of harmful substances. Sludge disintegration by high pressure jet impingement stream was investigated. The optimal range of three factors including impinged distance，impinged time， and impinged pressure were determined at a distance of 5cm， a time of 20~25min， and a pressure of around 13.79MPa. Response surface methodology(RSM)was used to analyze the disintegration effects and energy consumption. Disintegration energy ratio(DER)of soluble chemical oxygen demand(SCOD)was the evaluation index of RSM. Considering both disintegration effects and DER_SCOD， 5~6cm， 15~20min and 13.79MPa were suggested. This study provides new insights into physical sludge disintegration.