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Degradation analysis of A^2/O combined with AgNO3 + K2FeO4 on coking wastewater

Chinese Journal of Chemical Engineering 2018年第7期26卷 1555-1560页

作者： Pengyu Zhu Kaijin Zhu Rob Puzey Xiaoli Ren School of Engineering University of HullCottingham RoadHullthe United Kingdom Department of Environmental Engineering Taiyuan Institute of TechnologyTaiyuan 030008China

In this work, a coking wastewater was selected and a biochemical Az/O treatment device for fractional degradation was designed and employed. After each stage of the treatment, the products were analyzed through gas chromatography-mass spectroscopy （GC-MS） to determine their composition. Finally, AgNO3 ＋ K2FeO4 was used as an advanced deep catalytic oxidation treatment. It was concluded from the analysis that cyclic organics could be degraded and the chemical oxygen demand （COD） was controlled within 50 mg. L-1, in line with the target value, Meanwhile, the spectra obtained from the GC-MS were in accordance with the conclusions reached based on the COD. The research results showed that all hard-degradable organics in coking wastewater could be eliminated through the A2/O bio-membrane treatment and the advanced treatment of making use of K2FeO4 as an oxidant and Ag＋ as a catalyst, the catalytic efficiency with Ag＋ as a catalyst of K2FeO4 was very high. Ag＋ could evidently improve the oxidation capacity of K2FeO4 to wastewater in its short stability time, and this is an important innovation.

关键词： Coking wastewater Biochemical treatment AgNO3 + K2FeO4 catalytic oxidation cyclic organics Degradation characteristics

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