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Desalination and Water Treatment Volume 54, 2015 - Issue 11
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Articles

Electrochemical oxidation of mustard tuber wastewater on boron-doped diamond anode

Guishang ShengKey Laboratory of Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing400 045, P.R. China, Tel./Fax: +86 23 65120759;Faculty of Urban Construction and Environmental Engineering, Chongqing University, No. 174 Shazhengjie, Shapingba District, Chongqing400 045, P.R. China;National Centre for International Research of Low Carbon and Green Buildings, Chongqing University, Chongqing400 045, P.R. China
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Ping XiangKey Laboratory of Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing400 045, P.R. China, Tel./Fax: +86 23 65120759;Faculty of Urban Construction and Environmental Engineering, Chongqing University, No. 174 Shazhengjie, Shapingba District, Chongqing400 045, P.R. China;National Centre for International Research of Low Carbon and Green Buildings, Chongqing University, Chongqing400 045, P.R. ChinaCorrespondence[email protected]
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Shaojie JiangKey Laboratory of Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing400 045, P.R. China, Tel./Fax: +86 23 65120759;Faculty of Urban Construction and Environmental Engineering, Chongqing University, No. 174 Shazhengjie, Shapingba District, Chongqing400 045, P.R. China;National Centre for International Research of Low Carbon and Green Buildings, Chongqing University, Chongqing400 045, P.R. China
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Dandan MaKey Laboratory of Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing400 045, P.R. China, Tel./Fax: +86 23 65120759;Faculty of Urban Construction and Environmental Engineering, Chongqing University, No. 174 Shazhengjie, Shapingba District, Chongqing400 045, P.R. China;National Centre for International Research of Low Carbon and Green Buildings, Chongqing University, Chongqing400 045, P.R. China
Pages 3184-3191 | Received 07 Mar 2014, Accepted 05 Oct 2014, Published online: 03 Nov 2014
 
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Abstract

Boron-doped diamond (BDD) anode is a promising material for bio-refractory wastewater treatment in recent years. Due to the high conductivity of mustard tuber wastewater (MTWW), anodic oxidation of MTWW was evaluated using BDD as an anode, in order to diminish chemical oxygen demand and ammonium. The influence of several operating parameters including the applied current density, the dilution of the MTWW samples and the initial pH on the performance of electrochemical oxidation was investigated. At a current density of 50 mA cm−2, a dilution ratio of 1:2, without pH adjustment and 240 min of processing, the removal efficiencies achieved were 80.4% for COD and 100% for ammonium, and the corresponding specific energy consumption was 45.8 kWh m−3. The normalized concentration of COD and ammonium followed zero-order reaction kinetics with high correlation coefficients. The process was proved to be effective in degrading MTWW, despite this effluent’s usual refractoriness to biological treatment.

Acknowledgements

Financial support by the 111 Project (No. B13041) and the National Science and Technology Support Program (No. 2012BAJ25B06-001) are acknowledged.

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