Abstract

An emerging process to control bromate formation is to add chloramines upstream of the ozone contactor (Buffle et al., 2004). As part of this process, ammonia can be transformed?via nitrification?on a biologically active filter (Yun et al., 2009). In previous demonstration-scale testing, a nitrified biofilter resulted in an increase in the formation of N-nitrosodimethylamine (NDMA) during post-chloramination (Krasner et al., 2010). It was hypothesized that soluble microbial products (SMPs) from the nitrifiers were a source of NDMA precursors. In other research, laboratory-generated SMPs from activated sludge were found to contribute to the formation of NDMA (Krasner et al., 2008). In addition, in the demonstration-scale tests, there was more formation in the biofilter effluent at pH 9 at 5°C than at 25°C. However, it was not understand why this phenomenon occurred.

Original languageEnglish (US)
Title of host publicationAmerican Water Works Association Annual Conference and Exposition 2012, ACE 2012
Pages3919-3943
Number of pages25
StatePublished - Dec 31 2012
EventAmerican Water Works Association Annual Conference and Exposition 2012, ACE 2012 - Dallas, TX, United States
Duration: Jun 10 2012Jun 14 2012

Publication series

NameAmerican Water Works Association Annual Conference and Exposition 2012, ACE 2012

Other

OtherAmerican Water Works Association Annual Conference and Exposition 2012, ACE 2012
CountryUnited States
CityDallas, TX
Period6/10/126/14/12

ASJC Scopus subject areas

  • Water Science and Technology
  • Geography, Planning and Development

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  • Cite this

    Krasner, S. W., Lee, C. F. T., Liang, S., Mitch, W., Von Gunten, U., & Westerhoff, P. (2012). Impact of a nitrified biofilter on NDMA formation. In American Water Works Association Annual Conference and Exposition 2012, ACE 2012 (pp. 3919-3943). (American Water Works Association Annual Conference and Exposition 2012, ACE 2012).