Stickland A D, Harbour P J, Dixon D R, Scales P J
Particulate Fluids Processing Research Centre, Department of Chemical and Biomolecular Engineering, The University of Melbourne, Vic. 3010, Australia.
Water Res. 2007 Jan;41(1):206-16. doi: 10.1016/j.watres.2006.08.016. Epub 2006 Oct 16.
The filtration time, t(f), during constant pressure dead-end filtration testing of wastewater sludge is dependant on the initial height, h(0), and the initial solids concentration, phi(0). The theoretical dependencies of these initial conditions are explored: t(f) varies with h(0)(2) and cphi(0)(2), where c is a material dependant parameter that is also dependant on phi(0) and the applied pressure. Empirical values for c relative to a given phi(0) are determined from phenomenological filtration theory to give a qualitative scaling method to compare the filtration behaviour of highly compressible materials under differing initial conditions. The method is validated using filtration testing of municipal wastewater sludge. This new scaling method is applied to the filtration results of a range of different wastewater sludges, additives and treatments to illustrate its application for plant comparisons, polyelectrolyte comparisons, dose optimisation of polyelectrolyte and ferric chloride and combinations thereof, and the effects of two physicochemical treatments.
在废水污泥恒压死端过滤测试过程中的过滤时间t(f)取决于初始高度h(0)和初始固体浓度φ(0)。探讨了这些初始条件的理论相关性：t(f)随h(0)²和cφ(0)²变化，其中c是一个与材料相关的参数，它也取决于φ(0)和施加的压力。根据唯象过滤理论确定相对于给定φ(0)的c的经验值，以给出一种定性标度方法，用于比较不同初始条件下高压缩性材料的过滤行为。该方法通过城市废水污泥的过滤测试进行了验证。这种新的标度方法应用于一系列不同废水污泥、添加剂和处理方法的过滤结果，以说明其在工厂比较、聚电解质比较、聚电解质和氯化铁剂量优化及其组合以及两种物理化学处理效果方面的应用。
