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Practical Ozonation Byproduct Control 实用臭氧氧化副产物控制
发布日期: 2002-06-16
一项为期九个月的试点研究模拟了原水和沉淀水的臭氧氧化和常规处理。 臭氧组件装置包括六根直径为6英寸的有机玻璃柱,每根大约90英寸 英寸高,能够实现非常高的臭氧氧化CTs,以模拟隐孢子虫 灭活。对溴酸盐控制中的一氯胺、氨和pH调节进行了评估 在不同的臭氧剂量、温度和消毒条件下。 可治疗性研究是在德克萨斯州休斯顿附近的三一河上进行的。三位一体 这条河目前为德克萨斯州的许多公用事业提供供水。尽管原水中的溴含量 仅为中等(0.10- 隐孢子虫灭活所需臭氧剂量为0.20 mg/L) 容易产生高于10微克/升MCL的溴酸盐水平。臭氧消毒CT的目标 隐孢子虫灭活项目是在以往工作和单独工作的基础上建立的 由美国水务协会研究基金会进行。 对于氯胺评估,通过添加氯和氨形成一氯胺 以5:1的比例。提供原水或沉淀水臭氧氧化前的总余氯为2 mg/L 比在臭氧氧化前添加氨水或调节pH值更好的控制。例如,一个 2 mg/L的总余氯在一段时间内产生的溴酸盐水平始终低于5 ug/L 消毒温度和水温的范围。 溴酸盐以及其他臭氧氧化副产物(如醛类)的完整研究结果如下: 提出了。包括11个参考文献、表格、图表。
A nine month pilot study simulated raw and settled water ozonation and conventional treatment. The ozone module set-up included six, six-inch diameter plexiglass columns, each roughly 90 inches tall, and was capable of achieving very high ozonation CTs to simulate Cryptosporidium inactivation. Monochloramine, ammonia, and pH adjustment were evaluated for bromate control at various ozone doses, temperatures, and disinfection CTs. Treatability studies were performed on the Trinity River, near Houston, Texas. The Trinity River currently supplies many utilities in the state of Texas. Although raw water bromide levels are only moderate (0.10-0.20 mg/L), ozone doses needed for Cryptosporidium inactivation could easily produce bromate levels above the 10 ug/L MCL. Ozone disinfection CT goals for the project for Cryptosporidium inactivation were established based on previous and separate work conducted by American Water Works Association Research Foundation. For the chloramine evaluations, monochloramine was formed by adding chlorine and ammonia at a 5:1 ratio. Total chlorine residual of 2 mg/L prior to raw or settled water ozonation provided better control than either ammonia addition or pH adjustment prior to ozonation. For example, a total chlorine residual of 2 mg/L consistently produced bromate levels less than 5 ug/L for a range of disinfection CTs and water temperatures. Complete study results for bromate as well as other ozonation byproducts, such as aldehydes, are presented. Includes 11 references, tables, figures.
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发布单位或类别: 美国-美国给水工程协会
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