In this study, electrochemical treatment of urban wastewater with electrical conductivity of 1000 μS cm−1 and chemical oxygen demand of 250 mg L−1 was investigated using the variables of initial pH value, current density and flow rate. Electrocoagulation was used, in which aluminum and stainless steel were selected, as the electrochemical treatment process. The electrocoagulation process was operated in continuous mode. The data obtained in experimental studies show that the best COD removal efficiency occurred in experiments where the initial pH value was 6. The increase in current density from 5 A to 15 A decreased the removal efficiency from 79 to 67%. The increase in flow rate under constant current density also reduced the efficiency of removal as expected. In experiments in which current density and flow rate were examined together, the increase in flow rate allowed the application of higher current densities. This situation led to considerable reductions in energy consumption values, even if the COD removal efficiency did not significantly increase. The high COD removal obtained with the use of high flow rate and high current density indicates that the electrocoagulation process can be used for high flow rate municipal wastewater treatment.
Aim: Increasing industrialization has increased the demand for raw materials and the uncontrolled consumption of natural resources. Therefore, sustainability activities are at risk. Waste management is one of the basic parameters for the continuation of sustainability. In this study, circular economy and the importance of electronic waste in this economy are emphasized. The benefits of adding electronic waste to Turkey’s circular economy have been discussed and it has been aimed to raise awareness on this issue. Method: The information obtained by examining the published reports, studies, and current data on this subject has been evaluated and interpreted. Findings: The basis of the circular economy is the conversion of end-of-life wastes into an economic value through recycling or recovery using appropriate processes. The participation of electronic waste in circular economy practices will ensure that the harmful effects that may occur because of the storage and disposal of these wastes will be eliminated. Conclusion: Turkey should provide due importance to the circular economy process. It is essential to include electronic waste in this process. It is thought that the sustainability of this situation will contribute to both the Turkish economy and the protection of the environment and public health.
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