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Electrochemical oxidation as a post treatment for biologically tannery wastewater in batch reactor.
Water Sci Technol. 2019 Oct; 80(7):1326-1337.WS

Abstract

Tannery wastewater is known to contain high concentrations of organic compounds, heavy metals, nitrogen, sulphur, chromium, and many other chemicals. Both aerobic and anaerobic biological approaches have proven ineffective in the treatment of tannery wastewater due to the high salinity and toxic chemicals contained within the medium. Electrochemical oxidation presents a promising method for solving this problem. High pollutant removal efficiency, low energy consumption, and high electrode stability are three important factors supporting the feasibility of an efficient electrochemical treatment process. In the present study, electrochemical oxidation was performed as a post treatment for tannery wastewater (after biological pre-treatment) in a batch reactor using Ti/RuO2, Ti/IrO2, and Ti/BDD anodes. The effects of pH, current density, stirring rate and treatment time were studied to assess the treatment efficiency as well as the energy consumption of the process. The results showed that colour, chemical oxygen demand (COD), total organic carbon (TOC), and total nitrogen (TN) removal efficiencies on the electrodes were: Ti/RuO2 (88.8%, 88.40%, 64.0%, 96.4%), Ti/IrO2 (85.40%, 85.9%, 52.3%, 51.4%), Ti/BDD (90.60%, 94.7%, 90.5%, 82.7%) respectively, at a current density of 80 mA/cm2. All three electrodes demonstrated optimal performance at a pH of 8, a stirring rate of 400 rpm, a current density of 80 mA/cm2, and an electrolysis time of 5 h. The concentration of tri-chloromethane by-product was detected with limiting value. Electrochemical oxidation thus offers a feasible method for removing organic compounds and nutrients from tannery wastewater.

Authors+Show Affiliations

Department of Mechatronics and Sensor Systems Technology, Vietnamese German University, Thu Dau Mot City, Binh Duong Province, Vietnam E-mail: luu.tl@vgu.edu.vn.Department of Mechatronics and Sensor Systems Technology, Vietnamese German University, Thu Dau Mot City, Binh Duong Province, Vietnam E-mail: luu.tl@vgu.edu.vn.Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, 19 Nguyen Huu Tho Street, Tan Phong Ward, District 7, Ho Chi Minh City, Vietnam.Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, 19 Nguyen Huu Tho Street, Tan Phong Ward, District 7, Ho Chi Minh City, Vietnam.Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, Dist. 10, Ho Chi Minh city, Vietnam.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31850884

Citation

Le Luu, Tran, et al. "Electrochemical Oxidation as a Post Treatment for Biologically Tannery Wastewater in Batch Reactor." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 80, no. 7, 2019, pp. 1326-1337.
Le Luu T, Stephane DDF, Minh NH, et al. Electrochemical oxidation as a post treatment for biologically tannery wastewater in batch reactor. Water Sci Technol. 2019;80(7):1326-1337.
Le Luu, T., Stephane, D. D. F., Minh, N. H., Canh, N. D., & Thanh, B. X. (2019). Electrochemical oxidation as a post treatment for biologically tannery wastewater in batch reactor. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 80(7), 1326-1337. https://doi.org/10.2166/wst.2019.380
Le Luu T, et al. Electrochemical Oxidation as a Post Treatment for Biologically Tannery Wastewater in Batch Reactor. Water Sci Technol. 2019;80(7):1326-1337. PubMed PMID: 31850884.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemical oxidation as a post treatment for biologically tannery wastewater in batch reactor. AU - Le Luu,Tran, AU - Stephane,Djeuga Djeuga Franck, AU - Minh,Nguyen Hoang, AU - Canh,Nguyen Duc, AU - Thanh,Bui Xuan, PY - 2019/12/19/entrez PY - 2019/12/19/pubmed PY - 2019/12/20/medline SP - 1326 EP - 1337 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 80 IS - 7 N2 - Tannery wastewater is known to contain high concentrations of organic compounds, heavy metals, nitrogen, sulphur, chromium, and many other chemicals. Both aerobic and anaerobic biological approaches have proven ineffective in the treatment of tannery wastewater due to the high salinity and toxic chemicals contained within the medium. Electrochemical oxidation presents a promising method for solving this problem. High pollutant removal efficiency, low energy consumption, and high electrode stability are three important factors supporting the feasibility of an efficient electrochemical treatment process. In the present study, electrochemical oxidation was performed as a post treatment for tannery wastewater (after biological pre-treatment) in a batch reactor using Ti/RuO2, Ti/IrO2, and Ti/BDD anodes. The effects of pH, current density, stirring rate and treatment time were studied to assess the treatment efficiency as well as the energy consumption of the process. The results showed that colour, chemical oxygen demand (COD), total organic carbon (TOC), and total nitrogen (TN) removal efficiencies on the electrodes were: Ti/RuO2 (88.8%, 88.40%, 64.0%, 96.4%), Ti/IrO2 (85.40%, 85.9%, 52.3%, 51.4%), Ti/BDD (90.60%, 94.7%, 90.5%, 82.7%) respectively, at a current density of 80 mA/cm2. All three electrodes demonstrated optimal performance at a pH of 8, a stirring rate of 400 rpm, a current density of 80 mA/cm2, and an electrolysis time of 5 h. The concentration of tri-chloromethane by-product was detected with limiting value. Electrochemical oxidation thus offers a feasible method for removing organic compounds and nutrients from tannery wastewater. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/31850884/Electrochemical_oxidation_as_a_post_treatment_for_biologically_tannery_wastewater_in_batch_reactor_ L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2019.380 DB - PRIME DP - Unbound Medicine ER -