Full Description

In a constantly evolving regulatory environment, drinking water utilities consistently faceincreasing requirements for disinfection of pathogens while decreasing requirements forhealth threatening disinfection byproducts (DBPs). The disinfectants that the industry haverelied heavily upon in the past, chlorine and chloramines, can no longer meet the requirementsby themselves. Therefore, the time for the use of integrated disinfection has come. Thedisinfectants normally used in water treatment (free chlorine, chloramines, chlorine dioxide,ozone, and ultraviolet disinfection (UV)) all have advantages and disadvantages. The key, therefore, is to takeadvantage of positive characteristics of multiple disinfectants, resulting in improved finishedwater quality. Using integrated disinfectants also has the benefit of providing a multiplebarrier of protection to disinfection while providing a possible capital and operating costsavings. Utilities can also improve public perception through the use of sequentialdisinfectants by providing increased disinfection effectiveness while limiting the formation ofhealth threatening DBPs. Two example AWWA Research Foundation projects using integrated disinfectants, oneevaluating chlorine dioxide with ozone and one evaluating ozone with UV, have demonstratedthe benefits and practical application of integrated disinfection. Includes reference, table.

Product Details

Edition: Vol. - No. Published: 06/15/2003 Number of Pages: 8File Size: 1 file , 270 KB