SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (7): 1555-1560.DOI: 10.1016/j.cjche.2018.02.003

• Energy, Resources and Environmental Technology • Previous Articles     Next Articles

Degradation analysis of A2/O combined with AgNO3 + K2FeO4 on coking wastewater

Pengyu Zhu1, Kaijin Zhu2, Rob Puzey1, Xiaoli Ren2   

  1. 1 School of Engineering, University of Hull, Cottingham Road, Hull, the United Kingdom;
    2 Department of Environmental Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China
  • Received:2017-10-06 Revised:2018-02-06 Online:2018-08-16 Published:2018-07-28
  • Contact: Kaijin Zhu,E-mail address:zkj621104@163.com

Degradation analysis of A2/O combined with AgNO3 + K2FeO4 on coking wastewater

Pengyu Zhu1, Kaijin Zhu2, Rob Puzey1, Xiaoli Ren2   

  1. 1 School of Engineering, University of Hull, Cottingham Road, Hull, the United Kingdom;
    2 Department of Environmental Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China
  • 通讯作者: Kaijin Zhu,E-mail address:zkj621104@163.com

Abstract: In this work, a coking wastewater was selected and a biochemical A2/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.

Key words: Coking wastewater, Biochemical treatment, AgNO3 + K2FeO4 catalytic oxidation, Cyclic organics, Degradation characteristics

摘要: In this work, a coking wastewater was selected and a biochemical A2/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