Skip to content
6CCVD Research

Electrochemical oxidation as a post treatment for biologically tannery wastewater in batch reactor

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2019-10-01
JournalWater Science & Technology
AuthorsTran Le Luu, Djeuga Djeuga Franck Stephane, Nguyen Hoang Minh, Nguyen Duc Canh, Xuanā€Thanh Bui
InstitutionsTon Duc Thang University, Ho Chi Minh City University of Technology
Citations17

Abstract

Section titled ā€œAbstractā€

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.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2010 - Laboratory and pilot plant scale study on the electrochemical oxidation of landfill leachate [Crossref]
  2. 2006 - Electrochemical oxidation of organic pollutants for the wastewater treatment - direct and indirect processes [Crossref]
  3. 1999 - Treatment of tannery wastewater in a sequencing batch reactor [Crossref]
  4. 2009 - Electrochemical oxidation of organic compounds using boron-doped diamond electrode [Crossref]
  5. 2013 - Comparative study of electrochemical water treatment processes for a tannery wastewater efļ¬‚uent
  6. 2005 - Comparison of Ti/BDD and Ti/SnO2-Sb2O5 electrodes for pollutant oxidation [Crossref]
  7. 2004 - Treatment of tannery wastewater with high nitrogen content using anoxic/oxic membrane bio-reactor (MBR) [Crossref]
  8. 1995 - Anodic oxidation of phenol in the presence of NaCl for wastewater treatment
  9. 2009 - Effect of chloride concentration on the electrochemical treatment of a synthetic tannery wastewater
  10. 2008 - Electrochemical treatment of tannery wastewater using DSAĀ® electrodes [Crossref]

Reads Similar to This

The Mechanism of Oxidation of Formic Acid in Acidic Solutions on Boronā€Doped Diamond Electrodes - A Quantum Chemical Study New Insights into the Dynamics That Control the Activity of Ceriaā€“Zirconia Solid Solutions in Thermochemical Water Splitting Cycles Electrochemical deposition of bimetallic sulfides on novel BDD electrode for bifunctional alkaline seawater electrolysis