Reduction of COD in wastewater from an organized tannery industrial region by Electro-Fenton process

Advanced oxidation processes (AOPs) have led the way in the treatment of aqueous waste and are rapidly becoming the chosen technology for many applications. In this paper, COD reduction potential of leather tanning industry wastewaters by Electro-Fenton (EF) oxidation, as one of the AOPs, was experi...

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Bibliographic Details
Published in:Journal of hazardous materials 2007-05, Vol.143 (1), p.33-40
Main Authors: Kurt, Ugur, Apaydin, Omer, Gonullu, M. Talha
Format: Article
Language:English
Subjects:
Advanced oxidation processes
Applied sciences
Chemical engineering
COD
Electricity
Electro-Fenton
Exact sciences and technology
General purification processes
Hydrogen-Ion Concentration
Industrial Waste
Iron electrodes
Oxidation-Reduction
Pollution
Reactors
Sewerage works: sewers, sewage treatment plants, outfalls
Tannery wastewater
Tanning
Waste Disposal, Fluid - methods
Wastewaters
Water Pollutants, Chemical - chemistry
Water treatment and pollution
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Summary:Advanced oxidation processes (AOPs) have led the way in the treatment of aqueous waste and are rapidly becoming the chosen technology for many applications. In this paper, COD reduction potential of leather tanning industry wastewaters by Electro-Fenton (EF) oxidation, as one of the AOPs, was experimentally evaluated. The wastewater sample was taken from an outlet of an equalization basin in a common treatment plant of an organized tannery industrial region in Istanbul, Turkey. Treatment of the wastewater was carried out by an electrochemical batch reactor equipped with two iron electrodes, which were connected parallel to each other. The oxidation process was studied for optimization of H 2O 2 and the electricity consumptions were observed at different contact times under different pH conditions (3.0, 5.0 and 7.2). In each case, electricity consumption for decreased COD mass was estimated. In this process, COD was reduced by 60–70% within 10 min. By taking into consideration the local sewerage discharge limit, applicability of EF process for the tannery wastewaters was evaluated.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2006.08.065