Ruan Xiao-Dong, Liu Jun-Xin
Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China.
Huan Jing Ke Xue. 2013 Apr;34(4):1457-63.
The small-angle light scattering (SALS) experiment was executed to calculate the fractal region, and the data of particle size distribution was fitted by Gamma equation. Besides, the atomic force microscope (AFM) and confocal laser scanning microscopy (CLSM) were used to observe the morphology of the microstructure of the sludge flocs under different scales. The results showed that the sluge floc was constituted by a series of clusters with different sizes. The surface of the floc was unsmooth with various "holes" and "gaps" and there were a range of pore structures within the sludge floc. For sludge flocs at large scales, a variety of pore texture coexisted, forming a transport channel for the nutrients and water in the sludge. The results also showed that the fractal structure was present in sludge flocs in the size range of 0.5-50 microm and the particle size distribution was fitted to the Gamma equation distribution model, indicating that the sludge floc formation process is a process dominated by Cluster-Cluster flocculation.
进行小角光散射（SALS）实验以计算分形区域，并用伽马方程拟合粒度分布数据。此外，使用原子力显微镜（AFM）和共聚焦激光扫描显微镜（CLSM）观察不同尺度下污泥絮体微观结构的形态。结果表明，污泥絮体由一系列不同大小的团簇组成。絮体表面不光滑，有各种“孔洞”和“缝隙”，污泥絮体内存在一系列孔隙结构。对于大尺度的污泥絮体，多种孔隙纹理共存，形成了污泥中养分和水分的传输通道。结果还表明，在0.5 - 50微米尺寸范围内的污泥絮体中存在分形结构，且粒度分布符合伽马方程分布模型，表明污泥絮体形成过程是一个以团簇 - 团簇絮凝为主导的过程。
