Journal of South China University of Technology (Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (2): 144-152.doi: 10.3969/j.issn.1000-565X.2017.02.020

• Environmental Science & Technology • Previous Articles    

Advanced Treatment of Bagasse Pulping Effluent via γ-Al2O3 -Catalyzed Ozonation

MO Li-huan Tan Jin-qiang WANG Cong-cong XU Jun LI Jun   

  1. State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2016-04-07 Revised:2016-06-13 Online:2017-02-25 Published:2016-12-31
  • Contact: 徐峻( 1979-) ，男，博士，高级工程师，主要从事制浆造纸清洁生产技术及植物资源高值化利用相关研究． E-mail:xunjun@suct.edu.cn
  • About author:莫立焕( 1970-) ，男，博士，高级工程师，主要从事制浆清洁生产与污染控制研究． E-mail: lhmo@ scut． edu． cn
  • Supported by:
    Supported by the National Major Science and Technology Program for Water Pollution Control and Treatment( 2014ZX07213001)

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Abstract:

In this paper,a comparison was carried out between the ozone oxidation and the γ-Al2O3 -catalyzed ozonation for the treatment of bagasse pulping effluent.The results show that ( 1) γ-Al2O3 has a certain catalytic effect on ozone and can significantly improve the removal rate of CODCr ; ( 2) with the increase of pH value,reaction temperature,ozone concentration and catalyst dosage,the removal rate of CODCr first increases and then decreases; ( 3) the catalytic ozonation by γ-Al2O3 can also effectively remove the content of AOX ( Absorbable Organic Halogen) in the pulping effluent; and ( 4) in laboratory conditions,the removal rate of AOX reaches 80. 4% after a treatment for 30 min.Moreover,it is demonstrated by the UV and GC-MS results before and after the advanced treatment that γ-Al2O3 -catalyzed ozonation can significantly reduce the type and content of organic matters in the effluent and effectively degrade hard biodegradable organic matters; and that γ-Al2O3 is of good stability and repetition,concretely,after being reused for eight times,it still keeps 88. 5% of the catalytic activity.

Key words: pulping effluent, ozonation, γ-type aluminium oxide, catalytic activity

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