Water Research Department, Faculty of Civil Engineering, University of Zagreb, Zagreb, Croatia.
DOK-ING ENERGO d.o.o, Zagreb, Croatia.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2022;57(8):645-655. doi: 10.1080/10934529.2022.2099520. Epub 2022 Jul 15.
The increasing production of oily wastewater as a by-product of industry has become a major environmental problem. Therefore, this article investigates the removal of mineral oil from oily wastewater by a circulating flow sono-electrocoagulation. The Box-Behnken design was used to study the effects of characteristic electrocoagulation and ultrasonic parameters on mineral oil removal efficiency. A total of 34 different experimental setups were performed at a laboratory scale. A reduced cubic regression model with derived coefficients was developed to describe the mineral oil removal rate. The experimental results show that circulating flow sono-electrocoagulation with iron electrodes can effectively reduce mineral oil by 93.3% under the optimum conditions of 10.948 cycles, a current density of 107.12 A m and a flow rate of 0.468 L s. The experimental observations agreed well with the modeled values, and the model was verified experimentally. Under the optimal conditions, the average operating cost was 0.77 EUR/m.
随着工业副产品——含油废水产量的增加，它已成为一个主要的环境问题。因此，本文研究了通过循环流动声电凝聚法去除含油废水中的矿物油。采用 Box-Behnken 设计研究了特征电凝聚和超声参数对矿物油去除效率的影响。在实验室规模上共进行了 34 次不同的实验设置。建立了一个具有导出系数的简化立方回归模型来描述矿物油去除率。实验结果表明，在电流密度为 107.12 A/m、流量为 0.468 L/s 的最佳条件下，采用铁电极的循环流动声电凝聚可有效去除 93.3%的矿物油。实验观察结果与模型值吻合较好，模型得到了实验验证。在最佳条件下，平均运行成本为 0.77 欧元/m。
