engleski

WASTE METALS APPLICATION AS AN ANODE MATERIAL IN THE TREATMENT OF COMPOST LEACHATE

Although corrosion is generally a negative phenomenon in terms of the integrity of construction materials, when corrosion processes are applied in wastewater treatment, anodic dissolution of metals can have a positive effect on the removal of contaminants by electrocoagulation. To improve the electrocoagulation process and at the same time reduce the cost of processing, waste metal materials can be used as an anode material to remove pollutants from wastewater, which ensures metal reuse. In this paper, various waste materials (carbon steel, aluminium alloy AA 2007, and Zn) are tested as sacrificial anodes for the treatment of compost leachate. The experiments are carried out in a batch-type electrochemical reactor under different operating conditions planned according to Taguchi's L9 orthogonal array design. The effect of different waste metallic material (Fe, Al, Zn), initial pH values (4, 6, and 8), stirring speed (70, 170, and 270 rpm), and contact times (10, 20, and 30 min) on COD removals are examined. Electrode consumption is measured by weighing, and changes in electrode surfaces are monitored by microscopic analysis.

waste metals, sacrificial anode, electrocoagulation, process efficiency

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