污泥石灰干化工艺在北京小红门污水厂的应用

Application of Sludge Lime Drying Process in Xiaohongmen WWTP in Beijing

介绍了北京小红门污水处理厂污泥干化项目的工艺方案、实施情况和运行费用的影响因素。通过小红门污水处理厂污泥干化项目的运行及实验室检测数据，初步研究和分析了污泥原始含水率对处理后污泥含水率的影响以及石灰投加量对杀菌效果的影响。结果表明，针对小红门污水厂的污泥，仅需添加5％的石灰，即可将大肠杆菌的含量降至未检出水平。而为了使成品污泥含水率同样达到小于60％的效果，原始污泥含水率越低，所需投加的生石灰量越少，当原始污泥含水率为80％～85％时，需要的石灰投加量为20％～30％，而原始污泥含水率为77％～78％时，仅需投加13％的石灰。

The factors for influencing process, implementation and operation costs of sludge drying project of Xiaohongmen WWTP are introduced. Based on the operation of the project and the laboratory data, the influence of initial sludge moisture content on treated sludge moisture content as well as the influence of lime dosage on pasteurization effect are analyzed. The results show that for the sludge from Xiaohongmen WWTP, the addition of only 5% lime can reduce the number of fecal coliform to a non-detectable level. The dosage of lime varies according to water content in initial sludge in order to allow water content in sludge cake to be less than 60%. When the water content in initial sludge is 80% to 85% , the required lime dosage is 20% to 30% , and when the water content in initial sludge is 77% to 78% , the required lime dosage is 13%.