ABSTRACT Ozone disinfection is an efficient method, but it has no persistent disinfection effect, which is the main factor restricting its development. However, tea polyphenols are a renewable green resource and have continuous disinfection effect in drinking water treatment. Thus, it is beneficial to make tea polyphenols an auxiliary disinfectant to ozone disinfection, explore the combined disinfection effect of ozone and tea polyphenols, and optimize its operating conditions. The optimal disinfection effect of the combined disinfectant was determined by using a response surface analysis (RSA). This method of experimental design with three factors and three levels was used to establish a regression model for analysis. The results showed that the dosage of tea polyphenols was the most significant influencing factor; combined with ozone, the half-life of tea polyphenols was extended from 15 h to 77 h, which could achieve continuous control of network microorganisms. The optimal operating condition of the combined disinfectant was an ozone dosage of 2.5 mg/L, ozone contact time of 25 min, and tea polyphenol dosage of 20 mg/L. The advantages of tea polyphenols and ozone can be well exerted under these conditions, which will ensure the safety of effluent from microbes.

中文翻译：

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茶多酚与臭氧复合消毒效果及操作条件

摘要 臭氧消毒是一种有效的方法，但其消毒效果不持久，是制约其发展的主要因素。然而，茶多酚是一种可再生的绿色资源，在饮用水处理中具有持续消毒作用。因此，将茶多酚作为臭氧消毒的辅助消毒剂，探索臭氧与茶多酚的联合消毒效果，优化其操作条件，是有益的。通过使用响应面分析（RSA）确定组合消毒剂的最佳消毒效果。采用这种三因素三水平的实验设计方法建立回归模型进行分析。结果表明，茶多酚用量是最显着的影响因素；结合臭氧，茶多酚的半衰期由15 h延长至77 h，可实现对网络微生物的持续控制。组合消毒剂的最佳操作条件是臭氧用量为2.5 mg/L，臭氧接触时间为25 min，茶多酚用量为20 mg/L。在这些条件下，茶多酚和臭氧的优势可以得到很好的发挥，保证微生物出水的安全。