Treatment of tannery wastewater by electrocoagulation technology

Mia, Md. Abu Sayid; Alam, Md. Nur-E-; Ahmad, Feroz; Alam, Md. Zahangir; Rahman, Md. Mahmudur

doi:10.31254/jsir.2017.6403

Cited by 13 publications

(2 citation statements)

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“…Most of the research on tannery wastewater treatment in Bangladesh has been on lab scales, with no implementation at pilot or full scale. For instance, chemical coagulation (alum and ferric chloride) and electrocoagulation have been investigated for tannery wastewater. − For removing Cr from tannery wastewater, adsorption with low-cost adsorbents made from clay, coir pith, zeolite, spent tea leaves, and agricultural byproducts has been investigated. − More research should be tailored to addressing the treatment challenges faced by the tannery industry in Bangladesh. For tannery wastewater, along with optimization and improvement of treatment processes, valuable resource reuse and recycling need to be extensively advocated.…”

Section: Ongoing Research and Research Needs For Industrial Wastewate...mentioning

confidence: 99%

Industrial Water Demand and Wastewater Generation: Challenges for Bangladesh’s Water Industry

et al. 2023

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Bangladesh has experienced massive industrial growth in the past century. With the impressive industrial development, the country struggles to meet the demand for water and manage the wastewater generated. This paper critically analyzes Bangladesh's three significant industrial wastewaters: textile, tannery, and landfill leachate. The textile and leather industries are major freshwater consumers and wastewater generators in Bangladesh. Most textile factories across Bangladesh operate without effluent treatment plants, causing severe water pollution. Unlike textile plants, most tanneries are located in Savar, Dhaka. Savar's newly constructed central effluent treatment plant has serious design flaws and cannot meet discharge standards. Bangladesh has only three sanitary landfills for municipal solid waste disposal. With inadequate leachate collection and treatment facilities, the landfills have become point sources of surface water and groundwater pollution. The pollution of water resources is devastating as Bangladesh depends on surface water for irrigation and groundwater for drinking. Although Bangladesh has mandated laws and regulations for water pollution control, the lack of implementation is a significant problem. To get a better handle on industrial water demand and wastewater treatment, the Bangladesh government and the Department of Environment should work together to implement stricter laws and regulations and emphasize technical workforce development and stakeholder training.

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Section: Ongoing Research and Research Needs For Industrial Wastewate...mentioning

confidence: 99%

Industrial Water Demand and Wastewater Generation: Challenges for Bangladesh’s Water Industry

et al. 2023

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“…The effluents generated by this segment are among the most polluting and have high chemical complexity in their composition. The characteristics of tannery effluents vary greatly and depend on the characteristics of the used wash process, containing many chemicals, such as sodium and ammonium salts, lime, fat, tannins, dyes, proteins, chlorides, sulfates, sulfides and trivalent chromium, all of which are harmful to human, animal and plant health. , The processes employed in the treatment of hides and skins involve complex combinations of mechanical and chemical operations. Therefore, they may also contain oils, animal tissue remnants, emulsifying agents, dyes, organic tannins, animal hair, and other pollutants, which are responsible for high BOD (Biochemical Oxygen Demand) and COD values. − …”

Section: Applications Of the Ec Processmentioning

confidence: 99%

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Guerreiro Crizel,

Barreto,

Fiori

et al. 2024

ACS EST Water

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Electrocoagulation (EC) is an efficient treatment method that involves the electrodissolution of anodes, the formation of coagulants in situ, and the production of hydrogen at the cathode, facilitating the removal of pollutants by flotation. Industry in general aims to reduce the contaminant load, expressed as chemical oxygen demand (COD), and EC effluent treatment is particularly effective in this process. The development of EC processes has been an efficient alternative for the treatment of effluents with high pollutant loads, such as tannery, pulp and paper, textile, beverage, and food industries, and many demonstrate the potential for application in car wash effluent. This study presents a review of the use of EC for the treatment of various effluents containing COD, OGs, surfactants, color, and turbidity, but with a greater focus on the vehicle washing sector. It also discusses the factors that influence the efficiency of EC and the main discussions of the authors. Presently, the investigations of studies already carried out show that the performance of the EC process is dependent on many relationships and factors, such as the type of material constituting the electrode, the electric potential difference, the electric current density, the distance between electrodes, the surface area of the electrodes, the pH, the initial concentration of contaminants, the conductivity and the treatment time. The review demonstrated that the EC process has been employed in the treatment of many types of effluents and with relatively high efficiency rates, in general, between 60.0% and up to 90.0%, aiming at the reduction of the COD indexes, the reduction from 60.0% up to 99.0% of color content, the 87.0% reduction of chromium. In turn, for turbidity, it varied on average from 44.0 to 99.0%. For other parameters such as MBAS and OGs, in most studies, the reduction exceeded 90.0%.

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Organic and inorganic matter removal from tannery wastewater using the electrocoagulation process

Bingül

İrdemez

Yildiz

et al. 2022

Int. J. Environ. Sci. Technol.

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Treatment of tannery wastewater by electrocoagulation technology

Cited by 13 publications

References 0 publications

Industrial Water Demand and Wastewater Generation: Challenges for Bangladesh’s Water Industry

Industrial Water Demand and Wastewater Generation: Challenges for Bangladesh’s Water Industry

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Organic and inorganic matter removal from tannery wastewater using the electrocoagulation process

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