Skip to main content

Open Access Operational Keys to Nitrite Lock

Download Article:
 Download
(PDF 364.7 kb)
 

Abstract:

Nitrite-nitrogen seldom exceeds 1.0 milligram per liter (mg/L) in a properly controlled nitrification process. As soon as ammonia is oxidized to nitrite by ammonia oxidizing bacteria (AOB), the nitrite is oxidized to nitrate by nitrite oxidizing bacteria (NOB). Under certain environmental conditions, such as a poorly established or inhibited NOB population, the nitrite concentration will increase. High nitrite concentrations can interfere with disinfection and cause violations of effluent bacteria limits, result potentially in whole effluent toxicity (WET) failures, and cause effluent pH violations. An abnormal increase in secondary effluent nitrite is referred commonly as "nitrite lock". It is discussed frequently in the Water Environment Federations' Technical Discussion Forum and is not understood fully. This paper will explain nitrite lock, present case studies from four treatment plants, and outline operational strategies for preventing and controlling nitrite lock.

Keywords: DISINFECTION; INHIBITION; NITRIFICATION; NITRITE LOCK

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193317708X335226

Publication date: June 1, 2008

More about this publication?
  • Water Practice™ publishes peer-reviewed articles and reports focusing on applied water studies. Topics include monitoring, facility operations and maintenance, management, policy, and other issues of interest and concern to water practitioners. The Journal publishes on a monthly to bi-monthly basis and is available online only.
  • Membership Information
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites
wef/wp/2008/00000002/00000004/art00006
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