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首页> 外文期刊>Journal of Environmental Science and Health >Effectiveness of a hybrid process combining electro-coagulation and electro-oxidation for the treatment of domestic wastewaters using response surface methodology
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Effectiveness of a hybrid process combining electro-coagulation and electro-oxidation for the treatment of domestic wastewaters using response surface methodology

机译：响应面法结合电凝和电氧化混合工艺处理生活污水的有效性

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摘要

The performance of a two-stage process combining electro-coagulation (EC) and electro-oxidation (EO) was studied for the treatment of domestic wastewater (DWW) loaded with organic matter. The process was firstly evaluated in terms of its capability of simultaneously producing an oxidant and a coagulant agents using aluminum (Al) (or iron (Fe)) as bipolar and sacrificial electrodes, whereas graphite (Gr) electrodes were used as monopolar electrodes. Relatively high concentrations of chlorine (9.6 mg/min A) and Al (20-40 mg Al/L) or Fe (40-60 mg Fe/L) were produced. Subsequently, the factorial and central composite design methodologies were successively employed to define the optimal operating conditions for total chemical oxygen demand (COD) removal from DWW. Current intensity and treatment time were found to be very meaningful for chemical oxygen demand removal. The effect of these two main factors was around 90% on the investigated response, whereas the type of sacrificial electrode and the other interaction effects represent only 10%. The treatment using aluminum electrode and a current intensity imposed of 0.7 A during 39 min was found to be the optimal conditions in terms of cost/effectiveness. Under these conditions, 78% of COD removal can be obtained for a total cost of 0.78 US $/m~3.
机译：研究了电凝（EC）和电氧化（EO）结合的两阶段工艺对处理有机物的生活废水（DWW）的性能。首先以铝（Al）（或铁（Fe））作为双极电极和牺牲电极同时生产氧化剂和凝结剂的能力评估了该工艺，而石墨（Gr）电极用作单极电极。产生了相对较高浓度的氯（9.6 mg / min A）和铝（20-40 mg Al / L）或铁（40-60 mg Fe / L）。随后，采用阶乘和中心复合设计方法来定义从DWW中去除总化学需氧量（COD）的最佳操作条件。发现电流强度和处理时间对于去除化学需氧量非常有意义。这两个主要因素对所研究响应的影响约为90％，而牺牲电极的类型和其他相互作用影响仅占10％。就成本/效果而言，发现使用铝电极和在39分钟内施加0.7 A的电流强度的处理是最佳条件。在这些条件下，可以获得78％的COD去除，总成本为0.78 US $ / m〜3。

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