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Settling behaviour of polymer flocculated water-treatment sludge I:analyses of settling curves

机译：聚合物絮凝水处理污泥的沉降行为I：沉降曲线分析

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Settling behaviour of polymer conditioned water-treatment sludge was investigated in this study for the purpose of a better understanding of a so-called "CML30 method".Which was developed in previous study to evaluate the optimum polymer dosage in dludge conditioning.The "CML30 method"is no the basis of a 30 min settling test in 100 ml measuring cyclinders.In this study,the series of settling tests in 100,500 and 1000 ml measuring cyclinders were,respectively,performed and the settling curves (interfacial heitht to dose and time)were the main focuses for presentation and analyses in great detail in this paper.According to the experimental data presented tin theis study,settling behaviour may be controlled by both the growth of large sized floc and progressively decreased viscosity.The "speed-up"phenomenon in small polymer dose range obviously enhances the settlement and plays a critica role for the setting set in a 100 ml measuring cylinder at a special dose and at the ettling time interval 5-30 min.It is such apecial boseravtion that leads to the success of so-called ad hoc "CML 30 method".However,sludge settling behaviour could be controlled by the formation of networked structure which is involved in excess polymer during the large range (say over 10 mg/l for the case tested)of polymer doses.The higher liquid viscosity values derived from excess polymer willincrease the drag force for the resistance of the settlement.In addition,was effects are likely to interplay with the internal netweorked structure in large dosed region.
机译：为了更好地理解所谓的“ CML30方法”，本研究对聚合物处理过的水处理污泥的沉降行为进行了研究。在先前的研究中，开发了该聚合物以评估污泥处理中的最佳聚合物用量。 “方法”不是在100 ml测量自行车中进行30分钟沉降测试的基础。在本研究中，分别对100,500和1000 ml测量自行车进行了一系列沉降测试，并确定了沉降曲线（界面对剂量和时间的了解） ）是本文的主要介绍和分析的重点。根据本实验研究提供的实验数据，沉降行为可能受大型絮状物的生长和粘度逐渐降低的控制。在小剂量聚合物范围内的现象明显增强了沉降，并且对以特殊剂量和在滴定时间处在100 ml量筒中的设置设定起批评作用每次5至30分钟。正是这种特殊的硼氢化处理技术成功导致了所谓的“ CML 30方法”的成功。但是，污泥的沉降行为可以通过形成网状结构来控制，而网状结构的形成会在处理过程中过量的聚合物参与其中。大范围的聚合物剂量（例如，测试情况下超过10 mg / l）。过量聚合物产生的较高液体粘度值会增加阻力对沉降的阻力。此外，其作用可能与内部大剂量区域的网状结构。

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