Liu Xinghao, Yang Zhaoguang, Peng Jiayun, Chen Leilei, Yang Ying, Li Haipu, Yang Liqun
Center for Environment and Water Resource, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Changsha 410083, China.
Logistics Support Department of the Xiangya Hospital, Central South University, Changsha 410083, China E-mail:
Water Sci Technol. 2023 Apr;87(8):1893-1906. doi: 10.2166/wst.2023.099.
The advanced treatment of secondary effluents was investigated by employing heterogeneous catalytic ozonation integrated with a biological aerated filter (BAF) process. The results indicated that catalytic ozonation with the prepared catalyst (MnCuO/γ-FeO) significantly enhanced the performance of pollutant removal and broke up macromolecules into molecular substances by the generated hydroxyl radicals. These molecular substances were easily absorbed by microorganisms in the microbial membrane reactor. In the BAF process, chemical oxygen demand (COD) (chemical oxygen demand) decreased from 54.26 to 32.56 mg/L, while in catalytic ozonation coupled with the BAF, COD could be reduced to 14.65 mg/L (removal ratio 73%). Under the same condition, NH-N decreased from 77.43 to 22.69 mg/L and 15.73 mg/L (removal ratio 70%) in the BAF and the catalytic ozonation coupled with BAF, respectively. In addition, the model that highly correlated influent COD to effluent COD and reactor height for filler could predict the removal ratio of COD of the BAF system. Based on the microbial community analysis, ozone in the solution had a certain screening effect on microorganisms, which helped to better adapt to the ozone-containing environment. Therefore, the integrated process with its efficient, economic, and sustainable advantages was suitable for the advanced treatment of secondary effluents.
采用非均相催化臭氧化与曝气生物滤池（BAF）工艺相结合的方法，对二级出水的深度处理进行了研究。结果表明，使用制备的催化剂（MnCuO/γ-FeO）进行催化臭氧化可显著提高污染物去除性能，并通过产生的羟基自由基将大分子分解为分子物质。这些分子物质易于被微生物膜反应器中的微生物吸收。在BAF工艺中，化学需氧量（COD）从54.26mg/L降至32.56mg/L，而在催化臭氧化与BAF耦合的情况下，COD可降至14.65mg/L（去除率73%）。在相同条件下，BAF和催化臭氧化与BAF耦合时，氨氮分别从77.43mg/L降至22.69mg/L和15.73mg/L（去除率70%）。此外，进水COD与出水COD及填料反应器高度高度相关的模型可预测BAF系统的COD去除率。基于微生物群落分析，溶液中的臭氧对微生物有一定的筛选作用，有助于更好地适应含臭氧环境。因此，该集成工艺具有高效、经济和可持续的优势，适用于二级出水的深度处理。
