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研究报告

摘要：以某城市污水处理厂深度处理的反硝化生物滤池出水为原水，研究了臭氧氧化对再生水中有机物的去除效果及臭氧氧化后醛类的生成规律。结果表明，臭氧能有效降解水中有机物，臭氧投加量为8 mg·L^-1时，DOC、UV₂₅₄、色度的去除率分别为9.5%、45.6%和80.2%。三维荧光光谱荧光峰各区的荧光强度均随臭氧投加量的增加而降低，臭氧投加量为4 mg·L^-1时，再生水中的微生物代谢产物和腐殖质类物质的去除率分别为65.8%和63.2%。臭氧氧化产生的醛类副产物中甲醛和乙醛是主要的组成部分，当O₃/DOC（质量浓度比）=1.1时，除丙烯醛外，其他几种醛类的浓度均达到最大值；臭氧氧化能够降低后续氯消毒过程中三卤甲烷类消毒副产物的生成浓度，对三卤甲烷生成潜能（THMFP）的去除率为17%。

Abstract：The effect of ozonation on the degradation of dissolved organics and the formation of oxidation by-products with the effluent from a denitrification biological filter in an advanced wastewater treatment plant were investigated. The results demonstrated that ozonation had a high potential for oxidation of dissolved organic compounds in reclaimed water. The removal efficiencies of DOC, UV₂₅₄ and chroma were 9.5%, 45.6% and 80.2%, respectively at a dosage of 8 mg·L^-1. The results of three-dimensional fluorescence analysis showed that ozonation exhibited reduction efficiencies of approximately 65.8% for microbial metabolites and 63.2% for humic substances at a dosage of 4 mg·L^-1. Formaldehyde and acetaldehyde were the main ingredients of aldehydes compounds which being the main by-products of ozonation. Except acrolein, the concentrations of the other aldehydes reached the maximum when O₃/DOC=1.1. The concentrations of THMs generated in the following hyprocloride disinfection can decreased from 527.86 μg·L^-1 to 438.36 μg·L^-1 after ozonation at a dosage of 8 mg·L^-1.