作　　者： ; ; ; ;

机构地区： 同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室

出　　处： 《农业环境科学学报》 2005年第2期380-383,共4页

摘　　要： 采用好氧发酵仓式堆肥系统,研究了城市污泥处理过程中温度、含水率、pH、有机质、水溶性有机碳和发芽指数等指标参数的变化规律。结果表明,当物料初始含水率控制在60%左右时,在强制通风量为300L·m in-1,搅拌频率为5m in·8h-1～5m in·12h-1的工艺条件下,堆肥过程可以实现顺利升温并在55℃以上维持4d,满足杀灭致病菌要求的条件;14d反应周期结束时,物料含水率、水溶性有机碳和有机质含量显著降低,堆肥产品腐熟,卫生学指标达到了美国E PA污泥产品A类标准;得到的污泥产品成为性质优良的土壤质量调节剂。 A great deal of municipal sludge has been producing annually, and its components are very complex. How to stabilize and dispose the sewage sludge harmlessly is becoming more and more enormous challenge. The changes of chemicalparameters, such as temperature, moisture, pH, organic matter, water soluble organic carbon and germination index during the composting process were studied inthe present investigation. The optimal technological conditions for composting were evaluated. We have found that the water content of initial materials, forced ventilation volume and mixing frequency were 60%, 300 L·min-1and 5 min·8 h-1～5 min·12 h-1, respectively. The results indicated that the temperature could reach 55 ℃rapidly and lasted 4 days, suggesting that the conditions were able to fulfil the demand of sterilizing. Furthermore, the water content, water soluble organic carbon (WSOC) and organic matter reduced significantly during the composting process. In addition, the composing products in 14 days were almost mature, and could meet the class A hygienic standard of US EPA. The obtained composting products certainly become better regulator for soil fertility.

关 键 词： 污泥 堆肥 调理剂 强制通风

领　　域： [环境科学与工程]