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Electrocoagulation treatment of compost leachate using the waste of aluminium alloy, steel and zinc anode

The type of electrode material determines the chemical reactions that take place during electrocoagulation, as it influence on the type and the concentration of the coagulant dissolved ''in situ" into solution. As each material exhibits different rate of dissolution, it will influence the different energy consumption in the system too. In this paper, aluminium alloys, steel and zinc anode were used for the treatment of compost leachate at different initial pH values, stirring speed and contact times. After the implementation of the electrocoagulation process, the settling test and wastewater physico-chemical indicators (pH, electrical conductivity, temperature, turbidity) were determined in the supernatant. Electrode costs were evaluated from Faraday law and by measuring of electrode consumption before and after electrocoagulation. In addition, the operation cost of electrocoagulation process with different waste materials was compared.

electrocoagulation, aluminium alloys, steel, zinc, treatment

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