Treatment of poultry slaughterhouse wastewater using electrocoagulation: a review

Abstract

Poultry slaughterhouses are generally large consumers of fresh water, which is exhausted as wastewater characterized by a high concentration of biological oxygen demand (BOD), chemical oxygen demand COD, and fats, oil, and grease (FOG). Cost-effective methods are required for the treatment of poultry slaughterhouse wastewater, with the aim of attaining a high quality effluent that can be reused in industrial processes to promote sustainability. As compared to conventional treatment methods, electrocoagulation is an efficient and low-cost system. Electrocoagulation is environmentally friendly, treating wastewater without the need of chemicals, thus limiting secondary pollution. The metal anodes initiate electrochemical reactions for coagulation and flocculation. Its distinct advantages include compact installation and simple operation. This paper offers a comprehensive review of recent literature that has been dedicated to utilizing electrocoagulation for poultry slaughterhouse wastewater treatment. This paper also examines aspects such as theory, potential applications, current applications, as well as economical assessment of the technique.

Electrode material impact on microbial fuel cell and electro‐Fenton systems for enhanced slaughterhouse wastewater treatment: A comparative study of graphite and titanium

“…The increased chloride concentrations and high COD levels indicated the likelihood of contamination by industrial and organic sources (Wahyuni et al, 2022). The complex organic compounds present in the wastewater, as reflected in the BOD values, emphasized the substantial organic load, which could exert oxygen demand and adversely affect aquatic ecosystems (Ngobeni et al, 2021). The detection of heavy metals such as zinc, nickel, and cadmium raised concerns about the wastewater's potential long‐term environmental impact (Baby et al, 2011).…”

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

“…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] ]. 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 ].…”

Effect of Bio-Electrochemical Treatment of Hydroponic Effluent on the Nutrient Content

“…Among the drawbacks of electrocoagulation, there is electrode passivation (formation of oxide layers on electrodes), which limits the electrochemical process efficiency. Chloride ions help to crush the layer of oxides being formed, by penetrating the oxide layer where acid is formed [43]. Yang et al [44] also claim that the use of Cl − ions helps to counteract electrode passivation.…”