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首页> 美国卫生研究院文献>Journal of Zhejiang University. Science. B >Catalytic ozonation-biological coupled processes for the treatment of industrial wastewater containing refractory chlorinated nitroaromatic compounds
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Catalytic ozonation-biological coupled processes for the treatment of industrial wastewater containing refractory chlorinated nitroaromatic compounds

机译：催化臭氧氧化-生物耦合工艺处理难处理的含氯硝基芳香族化合物的工业废水

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A treatability study of industrial wastewater containing chlorinated nitroaromatic compounds (CNACs) by a catalytic ozonation process (COP) with a modified Mn/Co ceramic catalyst and an aerobic sequencing batch reactor (SBR) was investigated. A preliminary attempt to treat the diluted wastewater with a single SBR resulted in ineffective removal of the color, ammonia, total organic carbon (TOC) and chemical oxygen demand (COD). Next, COP was applied as a pretreatment in order to obtain a bio-compatible wastewater for SBR treatment in a second step. The effectiveness of the COP pretreatment was assessed by evaluating wastewater biodegradability enhancement (the ratio of biology oxygen demand after 5 d (BOD5) to COD), as well as monitoring the evolution of TOC, carbon oxidation state (COS), average oxidation state (AOS), color, and major pollutant concentrations with reaction time. In the COP, the catalyst preserved its catalytic properties even after 70 reuse cycles, exhibiting good durability and stability. The performance of SBR to treat COP effluent was also examined. At an organic loading rate of 2.0 kg COD/(m3·d), with hydraulic retention time (HRT)=10 h and temperature (30±2) °C, the average removal efficiencies of NH3-N, COD, BOD5, TOC, and color in a coupled COP/SBR process were about 80%, 95.8%, 93.8%, 97.6% and 99.3%, respectively, with average effluent concentrations of 10 mg/L, 128 mg/L, 27.5 mg/L, 25.0 mg/L, and 20 multiples, respectively, which were all consistent with the national standards for secondary discharge of industrial wastewater into a public sewerage system (GB 8978-1996). The results indicated that the coupling of COP with a biological process was proved to be a technically and economically effective method for treating industrial wastewater containing recalcitrant CNACs.
机译：采用改性的Mn / Co陶瓷催化剂和好氧顺序分批反应器（SBR），通过催化臭氧化工艺（COP），对含氯硝基芳香化合物（CNAC）的工业废水的可处理性进行了研究。使用单一SBR处理稀释废水的初步尝试导致去除颜色，氨，总有机碳（TOC）和化学需氧量（COD）的效果不佳。接下来，将COP用作预处理，以便在第二步中获得用于SBR处理的生物相容性废水。 COP预处理的有效性通过评估废水的生物降解能力增强（5 d后生物需氧量（BOD5）与COD的比率）以及监测TOC的演变，碳氧化态（COS），平均氧化态（ AOS），颜色和主要污染物浓度以及反应时间。在COP中，该催化剂甚至在70次重复使用循环后仍保持其催化性能，表现出良好的耐久性和稳定性。还检查了SBR处理COP废水的性能。在有机负载量为2.0 kg COD /（m 3 ·d），水力停留时间（HRT）= 10 h和温度（30±2）°C的情况下，NH3的平均去除效率COP / SBR耦合工艺中的-N，COD，BOD5，TOC和颜色分别约为80％，95.8％，93.8％，97.6％和99.3％，平均废水浓度为10 mg / L，128 mg / L，27.5 mg / L，25.0 mg / L和20的倍数，均符合将工业废水二次排入公共污水系统的国家标准（GB 8978-1996）。结果表明，COP与生物过程的耦合被证明是一种处理难处理的CNAC的工业废水的技术和经济有效的方法。

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