a Engineering Faculty, Department of Environmental Engineering, Cumhuriyet University , Sivas , Turkey.
Int J Environ Health Res. 2019 Oct;29(5):531-543. doi: 10.1080/09603123.2018.1554181. Epub 2018 Dec 5.
In this research, reduction of sludge production and improvement of sludge stabilization degree were aimed, and in this regard, the samples received from an urban wastewater treatment plant were subjected to electrocoagulation (EC) as a disintegration technique. A monopolar EC reactor was designed and iron electrode was used for sludge disintegration. The effect of reaction time, pH and varying current densities on disintegration degree (DD) was determined, and the optimum conditions were found as pH 7, 30 min (reaction time), and 150 A/m (current density). DD was found as 84.23%, and soluble chemical oxygen demand was found as 675.2 mg/L under optimum conditions. In this research, the disintegration stage of sludge was defined with the best second-order kinetic model. The operating cost was estimated as 0.078 €/m for optimum conditions. Also, the EC-induced disintegration ability of sludge was determined using total suspended solids, total organic carbon, capillary suction time, particle size distribution, specific surface area and viscosity. The findings showed that EC technique can be an effective means for sludge disintegration.
在这项研究中，旨在减少污泥产量并提高污泥稳定程度，为此，对来自城市污水处理厂的样品进行了电混凝（EC）作为一种解体技术。设计了一个单极 EC 反应器，并使用铁电极进行污泥解体。确定了反应时间、pH 值和不同电流密度对解体程度（DD）的影响，并找到了最佳条件为 pH 值 7、30 分钟（反应时间）和 150 A/m（电流密度）。在最佳条件下，DD 为 84.23%，可溶性化学需氧量为 675.2mg/L。在这项研究中，用最佳的二级动力学模型定义了污泥的解体阶段。估计最佳条件下的运行成本为 0.078 欧元/m。此外，还使用总悬浮固体、总有机碳、毛细吸水时间、颗粒分布、比表面积和粘度来确定 EC 诱导的污泥解体能力。研究结果表明，EC 技术可以是一种有效的污泥解体方法。
