Electrocoagulation treatment of industrial wastewater including textile dyeing effluent – a review

Abstract

Electrocoagulation (EC) treatment can be used as an effective alternative to the existing treatment methods. It is a distinct, economical and an environmental friendly choice for meeting water treatment discharge standards and compliance requirements. Due to improved material of construction and process design, the EC process is widely accepted. Presently, this process has gained attention due to its ability to treat large volume of effluent with low cost. The EC process includes the in-situ generation of coagulants via the electro-dissolution of a sacrificial anode, which is usually made up of iron or aluminum. This paper presents a review of the research works available in the open literature on the electrochemical treatment of industrial effluent such as textile, pulp and paper, paint, food, electroplating, distillery, etc. The mechanism and design consideration for electrochemical treatment of wastewater is also presented.

Wastewater treatment plant performance assessment using time-function-based effluent quality index and multiple regression models: the case of Bahir Dar textile factory

“…Studies have shown that temperature increases microbial activity and chemical reaction in the treatment plant (Altaher & Alghamdi, 2011 ; Mhlanga & Brouckaert, 2013 ; Tony, 2019 ). Moreover, the decomposition and removal efficiency of biodegradable organic pollutants and compounds, are highly dependent on temperature in the treatment plant (Sen et al, 2019 ; Uddin, 2021 ). Conversely, the increase of temperature beyond the limits could deplete the dissolved oxygen and increase the operational cost of the treatment plant (Bhave et al, 2020 ; Nawaz & Ahsan, 2014 ).…”

“…Based on Mhlanga and Brouckaert ( 2013 ) study, the levels of DO vary with wastewater temperature, characteristics of wastewater and mixing system, season, time of day, and rate of flow. Furthermore, releasing a low level of DO into the surface water highly affects the aquatic animals and forms intermediate pollutants due to the presence of organics in the wastewater (Asses & Ayed, 2021 ; Sen et al, 2019 ).…”

“…In Pavithra and Jaikumar ( 2019 ), the study elicited that high concentrations of TSS most probably emanated from the coloring material used in the textile process. An increase in suspended particles could also be the result of a shock load of influent solids that are mostly inorganic chemicals not prone to degradation, which in turn could decrease the microorganism suspended solid ratio in the aeration process (Sen et al, 2019 ). Moreover, this increment could also be due to poorly operated and unmanaged primary and secondary clarifiers of the textile treatment units (Tabassum et al, 2016 ).…”

Textile wastewater treatment plant performance assessment using time-function based effluent quality index and multiple regression models

“…Moreover, the decomposition and removal efficiency of biodegradable organic pollutants and compounds, are highly dependent on temperature in the treatment plant (Sen et al, 2019;Uddin, 2021). Conversely, the increase of temperature beyond the limits could deplete the dissolved oxygen and increase the operational cost of the treatment plant (Nawaz and Ahsan, 2014;Bhave et al, 2020).…”

Physicochemical and Microbiological Evaluation of Soil and Effluent Contaminated with Azo-Dye in Itoku, Abeoukuta Ogun State, Nigeria

“…Examples include physical or chemical flocculation, membrane filtration, electro kinetic coagulation, electrochemical destruction, and precipitation [11]. These types of technologies are inefficient, expensive, and have low adaptability to diverse types of dye effluent.…”