A Review of Promising Electrocoagulation Technology for the Treatment of Wastewater

Abstract

A review of the literature published on topics interrelated to electrochemical treatment within wastewater by using sacrificial anodes was presented. Electrocoagulation (EC) is a technique used for water and has a great ability on various wastewater treatments, industrial processed water, and medical treatment. It has potential in removing various pollutants such as chemical oxygen demand turbidity, ammonia, color, and suspended solid. One of the most necessities industries is Textile industries which release large volumes of wastewater that contains different dyes. Azo dyes contain strong N = N bond which is not easily broken by conventional methods. The discharge of this type of wastewater to natural watercourse can pose serious environmental impacts to aquatic life. Electrocoagulation (EC) method depends on several factors as electrode material, current density, operation time and PH. The review describes, discusses and compares the types of that electrode influencing the EC process in various wastewater and leachate. Both operating costs and electrical energy consumption values were found to vary greatly depending on the type of electrodes material and solution being treated.

Removal of Chromium (Cr) and Formaldehyde [CH₂O (H−CHO)] from Leather Tannery Effluents Using Electrocoagulation Treatment Process

“…Using electrocoagulation process, Fe (99.17%), Mn (99.97%), TSS (99.35%) and other metals such as Cu, Zn and Cd were removed in more than 99%, and removal of 45.14% COD, with an energy consumption of 3.30 kwh/m 3 at a cost of 0.29$ m -3 [51].…”

Electrocoagulation technique for removing Organic and Inorganic pollutants (COD) from the various industrial effluents: An overview

“…4 [10] The purpose of this work was to review studies conducted primarily between 2008 and 2011 on the wide and versatile range of feasible EC applications used in the purification of various types of water and wastewater. 5 [11] The goal of this proposed study is to discuss about different types of water and wastewater that have recently been treated with electrocoagulation-electro flotation (ECF) technology. 6 [12] The purpose of this study is to examine the potential of electrocoagulation for the treatment of industrial effluents, specifically the removal of dyes from textile effluent.…”

Environment -friendly processes: Electrocoagulation and Activated carbon filtration for reuse of textile wastewater

“…The textile industry contains poisoning substances besides considerable amounts of organic dye compounds [1,2]. These dyes are used widely in industries such as paper printing, pharmaceutical and, toy industries [2][3][4]. The carcinogenic dye compounds used in dyeing processes are released to the environment through wastewater.…”

“…The findings showed that not only the coloring and COD have a harmful effect on the activated sludge biomass but also the salt content of textile wastewater has negative effects [11,16,17] General mechanism summarized as follows [18,19]. (1)(2)(3)(4), the electrogenerated metal ions (M +n ) formation of coagulants in aqueous phase hydroxides and polyhydroxides having a strong affinity for the formation of coagulants in the aqueous phase [14,20] Additionally, the gases formed separate particles and coagulant aggregates at the electrodes by elevating them up through a flotation while accelerating collisions between particles and coagulant adsorption of soluble or colloidal contaminants on coagulants and removing by sedimentation or floatation [21].…”