不同干燥处理对城市污泥物理性质和农业利用的影响  

Effects of different drying condition on physical properties and agricultural utilization of municipal sewage sludge

作　　者：丘锦荣[1,2] 卫泽斌[2] 吴长安[2] 张俊 吴启堂[2] 

机构地区：[1]环境保护部华南环境科学研究所,广东广州510655 [2]华南农业大学资源环境学院,广东广州510642 [3]浙江省丽水市环境监测中心站,浙江丽水323000

出　　处：《生态环境学报》2009年第1期106-110,共5页Ecology and Environmental Sciences

基　　金：国家科技支撑计划项目(2007BAD89B14);环境保护部环保公益项目(200809093)

摘　　要：城市污泥农用正在成为世界各国处置污泥的主要方式之一,但干燥后的污泥通常结块程度高,硬度大,较难粉碎,对污泥的后续利用产生影响。试验设置了露天、棚内浇水和棚内不浇水等三个不同的污泥干燥处理,试验结果表明,露天状态处理干燥后的污泥要明显松散,结块程度较低;露天状态处理干燥后,粒径在5～10mm和小于5mm的污泥颗粒含量要显著高于棚内浇水和棚内不浇水处理,且露天处理干燥后污泥中水稳性团聚体所占比例最大,小于0.001mm的粒级(粘粒)所占比例最小,不易造成土壤板结。因此,露天处理干燥后的城市污泥对农用较为有利。After dryness of the municipal sewage sludge（MSS）, it always shows serious agglomeration and hard rigidity and is difficult to be crushed, so it is not suitable for agricultural utilization of MSS. There were three treatments： the open air treatment with sunlight and rain, the shed treatment with or without water artificially, were conducted to study the effects of drying on the MSS in this experiment. The results show that the MSS after drying in the open air was incompact, was not easy to form agglomeration. The result from the experiment of granule-classification of MSS after drying showed that there is more little granules in the MSS for the open air treatment, in which the content of MSS granules （5～10 mm and 1～5 mm） was obviously higher than that in shed treatments. There were also more water stable aggregates for the open-air treatment and the less proportion of sticky clays in the open-air treatment. So, the MSS dried in the open air with sunlight and rain was more suitable to the agricultural use concerning the physical properties.

关 键 词：城市污泥 干燥 颗粒分布 农业利用 

分 类 号：X703[环境科学与工程—环境工程]