Irstea, UR TSCF, Domaine des Palaquins, F-03150 Montoldre, France.
Irstea, UR TSCF, Domaine des Palaquins, F-03150 Montoldre, France.
Water Res. 2015 Oct 1;82:25-36. doi: 10.1016/j.watres.2015.04.008.
Sludge treatment is a multistep process during which sludge is mixed, pumped, thickened and dewatered. The total solid content (TSC) increases from a few grams to more than a hundred grams per liter and as underlined by the existing literature, rheological characteristics are key criteria for sludge management. However, these characteristics remain difficult to be determined in-situ and professionals are looking for alternative techniques to evaluate them. In that context, the potential of electrical measurements has been highlighted (Dieudé-Fauvel et al., 2009, 2014). This paper investigates the additional benefits of correlating both rheological and electrical properties for sludge characterization within the range of 1-23%TSC. On a rheological point of view, results are consistent with previous literature. In parallel, electrical impedance spectroscopy allowed us to define an equivalent electrical circuit to model the sludge electrical signature. Results highlight that the circuit parameters follow two regimes according to the range of solid content, similarly to rheological properties. This work opens new insights about sludge characterization and treatment monitoring.
污泥处理是一个多步骤的过程，在此过程中污泥被混合、泵送、浓缩和脱水。总固体含量（TSC）从每升几克增加到一百多克，正如现有文献所强调的，流变特性是污泥管理的关键标准。然而，这些特性仍然难以现场确定，专业人员正在寻找替代技术来评估它们。在这种情况下，已经强调了电测量的潜力（Dieudé-Fauvel 等人，2009 年，2014 年）。本文研究了在 1-23%TSC 的范围内将流变学和电学性质相关联以用于污泥特性描述的额外好处。从流变学的角度来看，结果与先前的文献一致。同时，阻抗谱允许我们定义一个等效电路来模拟污泥的电学特征。结果表明，根据固体含量的范围，电路参数遵循两个区域，类似于流变学性质。这项工作为污泥特性描述和处理监测开辟了新的视角。
