ABSTRACT Catalytic ozonation using activated carbon (AC) as catalyst for advanced treatment of biologically treated leachate (BTL) from municipal solid waste incineration plant was carried out in a microbubble reactor. The removal efficiency of chemical oxygen demand (COD) in the leachate was significantly improved over that in the conventional bubble reactor. The effects of AC dosage, ozone concentration, ozone flowrate and liquid reaction temperature on COD removal efficiency were studied. The results show that the COD removal efficiency increased with increasing AC dosage, ozone flowrate and inlet ozone concentration, and the reactor liquid phase temperature has little effects on the COD removal efficiency. The maximum COD removal efficiency reached 89.87% in the AC/O3 system under the optimal conditions. The catalytic activity of the AC still remained stable after five cycles of use. Ultraviolet-visible (UV-Vis) spectra and GC-MS analysis indicated that the AC-catalyzed ozonation can enhance the efficiency of the organic pollutants; the mechanism of AC deactivation was explored using the variation of AC-specific surface area and X-ray diffraction analysis. In addition, the regeneration of AC was proved effective by hydrochloric acid leaching. These results show that the combination of a microbubble reactor with AC provided a highly efficient ozonation process for the BTL.

中文翻译：

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微泡反应器生物处理城市生活垃圾渗滤液的催化臭氧化

摘要 以活性炭（AC）为催化剂的催化臭氧化对生活垃圾焚烧厂生物处理渗滤液（BTL）的深度处理在微泡反应器中进行。浸出液中化学需氧量（COD）的去除效率比传统鼓泡反应器显着提高。研究了AC用量、臭氧浓度、臭氧流量和液体反应温度对COD去除效率的影响。结果表明，COD去除效率随着AC用量、臭氧流量和入口臭氧浓度的增加而增加，反应器液相温度对COD去除效率影响不大。在最佳条件下，AC/O3 系统的最大 COD 去除效率达到 89.87%。AC的催化活性在使用五次循环后仍然保持稳定。紫外-可见 (UV-Vis) 光谱和 GC-MS 分析表明 AC 催化臭氧化可以提高有机污染物的效率；利用活性炭比表面积的变化和X射线衍射分析探讨了活性炭失活的机制。此外，通过盐酸浸出证明活性炭的再生是有效的。这些结果表明，微泡反应器与 AC 的结合为 BTL 提供了高效的臭氧化过程。利用活性炭比表面积的变化和X射线衍射分析探讨了活性炭失活的机制。此外，通过盐酸浸出证明活性炭的再生是有效的。这些结果表明，微泡反应器与 AC 的结合为 BTL 提供了高效的臭氧化过程。利用活性炭比表面积的变化和X射线衍射分析探讨了活性炭失活的机制。此外，通过盐酸浸出证明活性炭的再生是有效的。这些结果表明，微泡反应器与 AC 的结合为 BTL 提供了高效的臭氧化过程。