Contribution of wastewater to DBP formation

Stuart W. Krasner, Russell Chinn, Yingbo C. Guo, Cordelia J. Hwang, Salvador J. Pastor, Michael J. Sclimenti, Paul Westerhoff, Baiyang Chen, Zaid K. Chowdhury, Shahnawaz Sinha, Bruce Rittmann

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


The authors are conducting a project to evaluate how wastewater-derived disinfection byproducts (DBPs) and their precursors contribute to DBPs in drinking water. Here, a field survey of many different types of wastewater treatment plants documents that they are sources of halogenated DBPs, if chlorine disinfection is practiced, and DBP precursors in all cases. Because the level of ammonia in treated wastewater usually is high, the addition of chlorine typically forms combined chlorine (chloramines), which minimizes the instantaneous formation of most halogenated DBPs. However, nitrosamines (e.g, N-nitrosodimethylamine [NDMA]) often are formed. Treated wastewater contains residual drinking water natural organic matter (NOM). Although the dissolved organic carbon (DOC) concentration of the effluent organic matter (EfOM) is relatively high compared to drinking water, the humic content of the EfOM - based on specific ultraviolet absorbance (SUVA) - is relatively low. Waters low in SUVA tend to be less reactive with chlorine and typically form less trihalomethanes (THMs) and other DBPs per unit DOC. The presence of THM precursors and, in some cases, haloacetic acid precursors correlates best with SUVA. Preliminary data suggest that the formation of certain nitrogenous DBPs (e.g., haloacetonitriles and nitrosamines) or the presence of their precursors in treated wastewater is significant. The presence of precursors for some nitrogenous DBPs correlates with the level of dissolved organic nitrogen.

Original languageEnglish (US)
Title of host publicationAWWA 124th Annual Conference and Exposition
Subtitle of host publicationThe World's Water Event, ACE 2005
StatePublished - Dec 1 2005
EventAWWA 124th Annual Conference and Exposition: The World's Water Event, ACE 2005 - San Francisco, CA, United States
Duration: Jun 12 2005Jun 16 2005

Publication series

NameAWWA 124th Annual Conference and Exposition: The World's Water Event, ACE 2005


OtherAWWA 124th Annual Conference and Exposition: The World's Water Event, ACE 2005
Country/TerritoryUnited States
CitySan Francisco, CA

ASJC Scopus subject areas

  • Water Science and Technology


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