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首页> 外文会议>International Water Association(IWA) Conference; 20050518-20; Xi'an(CN) >Safety of treated water for reuse purposes- comparison of filtration and disinfection processes
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Safety of treated water for reuse purposes- comparison of filtration and disinfection processes

机译：可重复使用的处理水的安全性-过滤和消毒过程的比较

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摘要

A study was conducted on the distribution of pollutants in the treated wastewater and the its safety for reuse purposes. Based on the results of a series of tertiary treatment experiments, the effects of three filtration processes, i.e., coagulation-filtration, ozonation-biological activated carbon filtration (O_3-BAC) and ultrafiltration (UF), and two chemical disinfection processes, i.e. chlorination and ozonation on the safety of water reuse were evaluated. It was found that the concentrations of the main pollutants in the secondary effluent and further filtered water follow a log-normal distribution and therefore a log-normal probabilistic function can be used to evaluate the suitability of the treated water for reuse purposes. Among the three filtration processes evaluated, UF is the most effective in turbidity removal but less effective in colour and COD removal, while coagulation-filtration and O_3-BAC can ensure a good removal of all these pollutants. Regarding chemical disinfection, although chlorine is very effective in inactivation of coliform bacteria, it cannot achieve a substantial decrease in viruses. As ozone is applied, effective virus removal can be achieved.
机译：对处理后废水中污染物的分布及其可重复使用的安全性进行了研究。根据一系列三级处理实验的结果，对混凝-过滤，臭氧化-生物活性炭过滤（O_3-BAC）和超滤（UF）这三个过滤过程的影响以及两个化学消毒过程（即氯化）的效果臭氧化对中水回用的安全性进行了评估。已发现，次级废水和进一步过滤的水中主要污染物的浓度遵循对数正态分布，因此可以使用对数正态概率函数来评估处理后的水是否可重复使用。在所评估的三个过滤过程中，UF在去除浊度方面最有效，但在颜色和COD去除方面效果较差，而混凝过滤和O_3-BAC可以确保很好地去除所有这些污染物。关于化学消毒，尽管氯在大肠菌的灭活方面非常有效，但不能使病毒大量减少。使用臭氧后，可以有效去除病毒。

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