Skip to main content

Fate of NDMA in Tertiary Water Reclamation Plants

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

or click here to sign up for a free trial

Abstract:

N-nitrosodimethylamine (NDMA) is an emerging contaminant that can be formed from wastewater disinfection using chlorine. The California Department Health Services has set a notification level of 10 ng/L for NDMA due to its carcinogenic potency and mobility in groundwater. This paper summarizes the efforts of the Sanitation Districts of Los Angeles County (Sanitation Districts) on the evaluation of the occurrence and fate of NDMA at Sanitation Districts' water reclamation plants. These plants typically include primary sedimentation, activated sludge process with biological nitrogen removal, secondary sedimentation, media filtration, disinfection using chloramines, and dechlorination before discharge.

Bench-, pilot-, and full-scale studies were conducted at two water reclamation plants operated by the Sanitation Districts to evaluate NDMA formation and destruction. Results from these studies indicated: (1) influent NDMA concentrations fluctuate over a wide range; (2) the biological treatment process is capable of removing some influent NDMA; (3) use of chlorinated effluent to prepare cationic polymer solution for application in settling enhancement and foam control results in formation of high levels of NDMA; (4) chloramination increases NDMA concentrations significantly, but chlorination using free chlorine does not; and (5) ultraviolet (UV) disinfection of media filtered secondary effluent can result in 30 to 40% of incidental NDMA destruction.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864705783977385

Publication date: January 1, 2005

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites
wef/wefproc/2005/00002005/00000005/art00042
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more