• Whitley Wichmann posted an update 2 years, 9 months ago

    It is believed that the low SEC exhibited by NSP power could be useful for promoting the utilization of EC for wastewater treatment and could contr ibute to the reduction of the carbon footpr int of this process.The main pollutants from the textile industry are released from wetprocessing operations, such as scour ing, mercerizing, and dyeing. Wastewater discharge from the textile industry has high levels of chemical oxygen demand, pH, organic load, and synthetic color with low biodegradability. Therefore, textile wastewaters must be treated pr ior to their discharge to reduce their harmful effects on the environment.Electrocoagulation is a technology that can be utilized to treat wastewater based on its high efficiency and compact equipment.EC combines the benefits of coagulation, flotation, and electrochemistry in a single system.EC has been evaluated for wastewater treatment for many years.However, the high pr ice of electr ical energy is a fundamental obstacle limiting its application at an industr ial scale. The incipient introduction and promotion of renewable energy sources has decreased energy costs, generating renewed interest in EC for wastewater treatment.Reducing energy consumption is crucial for enhancing the economic feasibility of EC.Recently, the utilization of pulsesourced EC has been proposed to reduce energy consumption and avoid undesirable passivation of EC electrodes. Therefore, instead of utilizing chemical coagulants, electrodes are utilized as the only source of coagulants for the removal of pollutants from wastewater.Additionally, dosage control can be performed very conveniently by adjusting the cur rent voltage to facilitate automation. This paper proposes the utilization of a nanosecond pulse power supply to enhance textile wastewater treatment based on EC.NSP power facilitates EC operation at high voltages without any breakdown of the medium between electrodes, thereby promoting the formation of metal hydroxide flocs and increasing the quantity of hydrogen bubbles, which enhances the efficiency of pollutant removal.The results of these studies have shown that EC can efficiently reduce COD. Most of these studies utilized DC power supplies and focused on the investigation of the effects of pH, treatment time, and cur rent density on COD reduction efficiency.The application of an NSP power supply to reduce the COD of textile wastewater has rarely been considered.This paper proposes the utilization of NSP power to enhance COD reduction efficiency with low specific energy consumption. Such byproducts have not been investigated previously.It is clearly observed that the COD removal efficiency increases monotonically with voltage for both DC and NSP power supplies.Fur thermore, the amount of H gas bubbles generated by cathodes increases with increasing voltage, which contr ibutes to the removal of pollutants through via flotation.It can be recognized that this phenomenon is one of the advantages in EC process.Figure reveals that the DC and NSP power supplies operate at different voltage ranges.The maximum DC voltage is set to V to avoid the breakdown of the EC cell medium.In contrast, a voltage of V for the NSP power supply results in no medium breakdown.Additionally, the maximum COD removal efficiency values are and for DC and NSP power, respectively.It is wor th noting that V DC and V NSP power results in a similar COD removal efficiency.