Electrocoagulation is selected method to decrease concentration of heavy metal Cr and Zn, because it is easy in operation without using chemical addition that harmful for human. The purpose of this research studied the influence of efficiency toward the loading of concentration and the performance of electrode during electrocoagulation process used on continuous system. This experiment used three types of artificial wastewater, they were waste 1 contained 30.11 mg/L of Cr, 50.61 mg/L of Zn, 50.14 mg/L of Cu, waste 2 contained 41.08 mg/L Cr, 105.30 mg/L Zn, 103.25 mg/L Cu, and waste 3 contained 50.07 mg/L of Cr, 202.58 mg/L of Zn, 208.61 mg/L of Cu. This experiment used aluminum electrode with dimension of 10 cm x 15 cm, voltage of 12 volt, current strength of 5 ampere, and the operating time was 360 minutes by taking sample every 30 minutes. There was the washing of electrode every 120 minutes to increase the performance of electrode. Based on the research had been obtained the optimum time at each sample was 120 minutes which research up to 97% of efficiency and the optimum time of using electrode was 240 minutes. The best reduction of Zn reached 97.68% with the initial concentration of 50.61mg/L.
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机译：电凝是降低重金属Cr和Zn浓度的一种选择方法，因为它易于操作，而且无需使用对人体有害的化学添加剂。本研究的目的是研究连续系统电凝过程中效率对浓度负荷和电极性能的影响。该实验使用了三种类型的人工废水，分别为：废物1包含30.11 mg / L铬，50.61 mg / L锌，50.14 mg / L铜，废物2包含41.08 mg / L Cr，105.30 mg / L Zn， 103.25 mg / L的Cu和废物3中包含50.07 mg / L的Cr，202.58 mg / L的Zn，208.61 mg / L的铜。该实验使用尺寸为10 cm x 15 cm，电压为12伏，电流强度为5安培的铝电极，每30分钟取样一次的操作时间为360分钟。每120分钟洗一次电极以提高电极性能。根据研究，每个样品的最佳时间为120分钟，研究效率高达97％，使用电极的最佳时间为240分钟。初始浓度为50.61mg / L时，锌的最佳还原率达到97.68％。
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