芦苇床与传统干化床污泥脱水和稳定性能比较  

Comparison of residual sludge dewatering and stabilization between reed beds and conventional sludge drying bed

作　　者：孙红杰[1,2] 崔玉波[2] 王芳[2] 刘颖慧[2] 包双翔[2] 

机构地区：[1]东北大学资源与土木工程学院,沈阳110004 [2]大连民族学院环境与资源学院,辽宁大连116600

出　　处：《安全与环境学报》2011年第6期81-84,共4页Journal of Safety and Environment

基　　金：国家自然科学基金项目(50978048)

摘　　要：为探明污泥干化芦苇床中积存污泥的脱水性能和稳定化进程,进行了为期3 a的试验研究。试验分3个单元,Ⅰ单元为对照床,未种植植物;Ⅱ单元和Ⅲ单元种植芦苇。Ⅰ单元和Ⅱ单元底层通过穿孔PVC通风管与大气相连通。前2 a为负荷期,植物生长期进泥,冰封期闲置,期间每个单元进泥总厚度为8.4 m;第3 a为污泥自然稳定期。结果表明:种植芦苇的Ⅱ单元和Ⅲ单元对污泥中有机质的去除效果优于传统于化床Ⅰ单元,对应的有机质降解率分别为54.5%、51.5%和43.3%,填料层设置通风结构利于污泥有机质的降解;具有通风结构的Ⅰ、Ⅱ单元比不设通风的Ⅲ单元污泥脱水率略高,平均脱水率分别为33.69%、34.15%和32.79%。经过3 a芦苇床处理,稳定化污泥最低有机质质量分数为28.7%。The article is aimed to present the results of our comparative study of residual sludge dewatering and stabilization between reed beds and conventional sludge drying bed. As is known, sludge drying reed beds appear as a new and alternative treating method, whose advantages are low energy demands, reduced operating and maintenance costs, with little environmental impact. For the purpose of understanding residual sludge dewatering and stabilization features in sludge drying reed beds, we have laid out a pilot scale experiment which lasts three years on testing three sludge drying beds. Bed Ⅰ was unplanted, known as the control bed; bed Ⅱ and bed Ⅲ were planted with reeds. The bottoms of bed Ⅰ and bed Ⅱ are connected to the atmosphere through perforated PVC ventilation tubes through the overlying porous medium. The first two years were sludge loading period, whereas the beds in the third year were taken as their natural stabilization period. At the same time, the beds were fed during plant growing season, and rested in frozen up period, with each bed loaded totally 8.4 meters of residual sludge. Samples of influent sludge and sludge accumulated in the beds were analyzed for organic matter and water content. The results of our experiments can be stated as follows： the organic matter removal and sludge stabilization in the beds was found going on progressively, the planted sludge drying reed beds Ⅱ and Ⅲ prove to be able to remove the organic matter from the residual sludge more effectively than the unplanted bed Ⅰ, in the corresponding rate of 54.5%, 51.5% and 43.3% in organic matter degradation efficiencies, and the ventilation contributes to organic matter degradation and transformation. However, beds Ⅰ andⅡ with ventilation tubes possess higher sludge dewatering efficiencies than bed Ⅲ, in the corresponding average rate of 33.69%, 34.15% and 32.79% of dewatering efficiencies. And in the end of the third year, minimum organic matter content in the stabilized sludge is 28.7%, which can be use

关 键 词：环境工程学 有机质 芦苇床 污泥 脱水 污水处理 

分 类 号：X703[环境科学与工程—环境工程]