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Chemcial Industry and Engineering 2017, Vol. 34 Issue (2) :62-67    DOI: 10.13353/j.issn.1004.9533.20151082
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Removal of COD from Sewage by Integrated E-Fenton and Ozone
Zhang Weijun, Qi Wei, Su Rongxin, He Zhimin
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract 

Advanced oxidation processes (AOPs) are considered a new type of environmental-friendly technology used for wastewater treatment. AOPs are based on the generation of a large amount of hydroxyl radicals rapidly through a variety of reinforcement technologies, then organics in the sewage can be quickly and efficiently degraded into harmless inorganic salts by chain reaction induced between hydroxyl radicals and the organic matters. As two typical technologies of the AOPs, Electro-Fenton and ozone were introduced for ship sewage treatment by integrated method. The efficiency of this new E-Fenton/O3 system on the ship sewage treatment was evaluated in terms of its removal efficiency of chemical oxygen demand (COD). The results showed that under optimal reaction conditions that included a current density of 20 mA/cm2, Fenton reagent (H2O2 and Fe2+) ratio of 3:1 with Fe2+ dosage of 0.01 mol/L, the O2 flow rate of 2 L/min and the ozone dosage of 6 g/L, the integrated process by E-Fenton/O3 system could effectively degrade sewage and achieve the removal of COD as high as 86.4% in 120 min.

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Articles by authors
Zhang Weijun
Qi Wei
Su Rongxin
He Zhimin
Keywordssewage;   Electro-Fenton;   ozone;   COD;   hydrogen peroxide     
Received 2015-05-09;
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Zhang Weijun, Qi Wei, Su Rongxin, He Zhimin.Removal of COD from Sewage by Integrated E-Fenton and Ozone[J]  Chemcial Industry and Engineering, 2017,V34(2): 62-67
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