高压喷射撞击流破解剩余污泥的研究  

Study on Excess Sludge Disintegration by High Pressure Jet Impingement Stream

作　　者：谢元华[1] 杨岱恩 白冰[1] 朱彤[1] XIE Yuan-hua;YANG Dai-en;BAI Bing;ZHU Tong(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2021年第12期1790-1796,共7页Journal of Northeastern University(Natural Science)

基　　金：中央高校基本科研业务费专项资金资助项目(N15030401).

摘　　要：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5 cm,时间20~25 min,压力13.79 MPa.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5~6 cm,时间15~20 min,压力13.79 MPa.该研究为污泥物理破解提供了新的思路.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 5 cm,a time of 20~25 min,and a pressure of around 13.79 MPa.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,5~6 cm,15~20 min and 13.79 MPa were suggested.This study provides new insights into physical sludge disintegration.

关 键 词：剩余污泥 高压射流 撞击流 响应面法 污泥破解 

分 类 号：X705[环境科学与工程—环境工程]