北京大学学报自然科学版 ›› 2022, Vol. 58 ›› Issue (1): 177-185.DOI: 10.13209/j.0479-8023.2021.095

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分体式流化床催化臭氧–絮凝工艺深度处理焦化废水生化尾水

初永宝1, 陈德林1, 刘生2,3, 徐毅2,3, 赵华章2,3,†   

  1. 1. 青岛科技大学环境与安全工程学院, 青岛 266042 2. 北京大学环境科学与工程学院, 北京 100871 3. 北京市新型污水深度处理工程技术研究中心, 北京 100871
  • 收稿日期:2021-02-22 修回日期:2021-03-12 出版日期:2022-01-20 发布日期:2022-01-20
  • 通讯作者: 赵华章, E-mail: zhaohuazhang(at)pku.edu.cn
  • 基金资助:
    国家杰出青年科学基金(21925801)资助

Split Fluidized Bed Catalytic Ozone-Flocculation Process for Advanced Treatment of Biochemical Tail Water from Coking Wastewater

CHU Yongbao1, CHEN Delin1, LIU Sheng2,3, XU Yi2,3, ZHAO Huazhang2,3,†   

  1. 1. College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042 2. College of Environmental Sciences and Engineering, Peking University, Beijing 100871 3. Beijing Engineering Research Center for Advanced Wastewater Treatment, Beijing 100871
  • Received:2021-02-22 Revised:2021-03-12 Online:2022-01-20 Published:2022-01-20
  • Contact: ZHAO Huazhang, E-mail: zhaohuazhang(at)pku.edu.cn

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摘要：

采用催化臭氧–絮凝联用工艺处理焦化废水生化尾水, 寻求最优处理效果, 探究废水中溶解性有机污染物的特征和降解过程。通过自主设计的分体式流化床催化臭氧装置对废水进行处理, 结果表明, 在30%体积比的催化剂投加量、3 L/min的臭氧流量以及700 mg/L的絮凝剂投加量这一最佳反应条件下, 焦化废水生化尾水的COD去除率为83.7%, TOC去除率为72.3%。紫外–可见光谱和三维荧光光谱分析结果表明, 焦化废水生化尾水中普遍存在的芳香族化合物、腐殖酸类物质、可溶性微生物的代谢产物和富里酸类物质在催化臭氧化阶段被部分降解, 最终在絮凝阶段实现残留污染物和惰性中间产物的去除。

关键词: 焦化废水, 催化臭氧化, 絮凝, 流化床, 三维荧光光谱

Abstract:

The catalytic ozonation-flocculation combined process was applied for the treatment of the biochemical tail water of coking wastewater. The optimal treatment performance was investigated and the characteristic and degradation process of dissolved organic pollutants in wastewater was studied. A self-designed split type fluidized bed catalytic ozonation reactor was adopted for the experiment. The results showed that under the optimal reaction conditions (30% catalyst dosage ratio, 3 L/min ozone flow rate, and 700 mg/L flocculant dosage), the COD removal rate of coking wastewater biochemical tail water was 83.7%, and the TOC removal rate was 72.3%. Through the analysis of ultraviolet-visible spectrum and three-dimensional fluorescence spectrum, the smell aromatic compounds, humic acid, soluble microbial metabolites, and fulvic acid material, generally presented in coking wastewater biochemical tail water, was partially degraded during the stage of catalytic ozonation, which was eventually removed in the flocculation stage. The intermediate was also degraded in the flocculation stage.

Key words: coking wastewater, catalytic ozonation, flocculation, fluidized bed, three-dimensional fluorescence spectrum

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