School of Civil, Environmental and Chemical Engineering, RMIT University, Victoria 3001, Australia.
Water Sci Technol. 2012;65(4):697-702. doi: 10.2166/wst.2012.893.
Globally, wastewater treatment plants are under pressure to handle high concentration sludge in a sludge treatment line. Unawareness of the non-Newtonian behaviour of the thickened sludge has the potential to cause unexpected problems when the fluid behaviour changes from turbulent to laminar flow. In this study, sludge apparent viscosity was plotted as a function of total suspended solids concentration (TSS) and shear rate. Then, the transition velocity based on several predictive models in the literature was determined. This analysis provides a practical basis for the prediction of the pipe flow behaviour of thickened sludge in troubleshooting and engineering design.
在全球范围内，污水处理厂面临着在污泥处理线中处理高浓度污泥的压力。如果对增稠污泥的非牛顿行为认识不足，当流体从湍流变为层流时，可能会导致意想不到的问题。在这项研究中，污泥表观粘度被绘制成总悬浮固体浓度 (TSS) 和剪切率的函数。然后，根据文献中的几种预测模型确定了基于速度。该分析为预测增稠污泥在故障排除和工程设计中的管流行为提供了实用基础。
