Solid-liquid separation aims to increase the solids concentration. The dewatering extent can be parameterized through the compressive yield stress, p y ( ϕ ) whereby to further consolidate a suspension, higher stress has to be applied to the material. In a variety of dewatering devices, shear (in addition to unilateral compression) is applied to the material and is demonstrated to be of benefit to the process, albeit without a basis for optimisation. To address this fundamental issue, two novel measurement techniques, namely the Vane-in-a-Filter (ViaF) and the Vane-under-Compressional-Loading (VuCL), are presented, allowing measurement of the shear stress response with different normal loads under fixed solids concentrations. Furthermore, high solid concentration shear yield stress measurements are possible. The results demonstrate that the shear stress response increases with normal load (at a fixed state of compression) and the peak shear stress has a minimum at shear rates of 0.01–0.1 s −1 . Graphical abstract

中文翻译：

---

过滤器中的叶片和压缩载荷下的叶片：表征组合剪切和压缩的新方法

固液分离旨在提高固体浓度。脱水程度可以通过压缩屈服应力 py ( ϕ ) 进行参数化，从而进一步巩固悬浮液，必须对材料施加更高的应力。在各种脱水设备中，剪切（除了单边压缩）被应用于材料，并被证明对过程有益，尽管没有优化的基础。为了解决这个基本问题，提出了两种新颖的测量技术，即过滤器中的叶片 (ViaF) 和压缩载荷下的叶片 (VuCL)，允许测量不同法向载荷下的剪切应力响应在固定的固体浓度下。此外，高固体浓度剪切屈服应力测量是可能的。结果表明，剪切应力响应随法向载荷（在固定压缩状态下）而增加，并且峰值剪切应力在剪切速率为 0.01–0.1 s -1 时具有最小值。图形概要