Effect of solid contents on the controlled shear stress rheological properties of different types of sludge
Effect of solid contents on the controlled shear stress rheological properties of different types of sludge
复制标题
固体含量对不同类型污泥受控剪切应力流变特性的影响
DOI：
10.1016/s1001-0742(11)61041-3
复制
发表时间：
2012-01-01
影响因子：
6.9
通讯作者：
Dong, Yujing
中科院分区：
文献类型：
--
作者：
Li, Ting;Wang, Yili;Dong, Yujing
采用控制剪应力试验研究了固体含量对污泥相应流变参数的影响。收集了活性污泥(AS)、厌氧消化污泥(ADS)和水处理残渣(WTR)三种调理前后的污泥进行了CSS试验。结果表明，在大多数情况下，随着总悬浮物(TSS)含量的增加，污泥网络的屈服应力和内聚能都有所提高。对于有条件的AS/ADS和原始WTR，材料网络的内聚能或屈服应力与TSS含量之间的关系符合指数规律，而对于条件WTR，剪切弹性模量或临界应变参数与TSS含量之间只有指数规律依赖关系。
Controlled shear stress (CSS) test was used to study the effect of solid contents on the corresponding rheological parameters for sludge. Three types of sludge with or without conditioning, including activated sludge (AS), anaerobic digested sludge (ADS), and water treatment residuals (WTRs), were collected for the CSS test. Results showed that the yield stress and the cohesion energy of the sludge networks were improved with increased total suspending solid (TSS) contents in most cases. For the conditioned AS/ADS and the raw WTRs, exponential law was observed in the relationships between cohesion energy of material networks or yield stress and the TSS contents, whereas for the conditioned WTRs, only exponential law dependence was found between the parameters of shear modulus or critical strain and the TSS contents.