Removal of Cypermethrin and Chemical Oxygen Demand from Livestock Wastewater by Electrocoagulation

Abstract

The direct discharge of wastewater from livestock into freshwater and surface runoff originating from processing areas threaten aquatic ecosystems and the quality of drinking water taken from streams. The present work studied the removal of chemical oxygen demand (COD) and cypermethrin (Cyp) from livestock wastewater generated after cattle baths by a continuous electrocoagulation (EC) process. The effect of pH, retention time, and voltage on COD and Cyp removal was examined. Under the optimal operating conditions, EC effectively removed COD (93 %) and cypermethrin (96 %). Thus, continuous EC was successfully applied to treat livestock wastewater.

Enhancing the Performance and Stability of the Co-anaerobic Digestion of Municipal Sludge and Food Waste by Granular Activated Carbon Dosing

“…The samples were centrifuged at 7500 r·min –1 for 15 min, the supernatant was passed through a 0.45 μm water filtration membrane, and the soluble components were collected. The American Public Health Association methods were used to determine the soluble chemical oxygen demand (sCOD) and NH 4 + -N content in the supernatant. The compositions of organic acids were determined by high-performance liquid chromatography .…”

Response surface methodology for process optimization in livestock wastewater treatment: A review

“…Chemical treatment methods offer effective means of treating LWW to remove pollutants and improve its quality before discharge into the environment or reuse. Chemical treatment methods are usually applied in combination with physical and biological treatments to achieve maximum efficiency [ 134 , 135 ] or as a standalone process [ 13 , [136] , [137] , [138] , [139] , [140] , [141] ]. The most widely used chemical LWW treatment methods include precipitation, coagulation and flocculation, pyrolysis, electrocoagulation, adsorption, and Fenton processes, and can be optimized using RSM for better process performance and resource conservation ( Table 5 ).…”

“…Electrochemical treatment, another popular LWW management approach that has attracted considerable attention in recent years. Among different electrochemical treatment technologies, electrocoagulation is most widely used due to its simplicity and ability to treat a wide array of pollutants including emerging contaminants present in LWW [ 138 , [143] , [144] , [145] , [146] , [147] ]. Regardless of electrode materials, parameters such as current density, pH, treatment time, electrolyte concentration, and interelectrode gaps are important for the successful and efficacious operation of electrocoagulation processes [ [148] , [149] , [150] , [151] ].…”

“…Regardless of electrode materials, parameters such as current density, pH, treatment time, electrolyte concentration, and interelectrode gaps are important for the successful and efficacious operation of electrocoagulation processes [ [148] , [149] , [150] , [151] ]. Studies posited that optimization of the above-mentioned process parameters using RSM can significantly improve pollutant removal efficiencies and alleviate LWW treatment costs [ 138 , 147 , 152 ]. These findings are also applicable to other chemical LWW treatment technologies like adsorption, Fenton, and pyrolysis processes.…”

Exploring the potential of highly efficient graphite/chitosan–PVC composite electrodes in the electrochemical degradation of Reactive Red 4

“…Several studies have reported the optimization of applied voltage in the electrochemical treatment of hazardous pollutants. 16,45,49 The RR4 degradation performance was evaluated at various applied voltages from 1, 5, 10, 15 to 20 V with an initial concentration of RR4 at 200 mg L −1 and 0.4 mol L −1 NaCl concentration f as the supporting electrolyte at pH 6 and 30 °C for 60 min electrolysis time.…”