WEF Discussions — Now on LinkedIn!

WEF is pleased to announce the creation of free LinkedIn groups associated with its technical discussion forum topics. Through these LinkedIn groups, members will be able to view and participate in discussions, as well as communicate with one another via direct messages. Share your experiences and knowledge, ask questions and respond to other discussions as frequently as you like!

You must have a LinkedIn profile to join a LinkedIn group; you can create your profile here. If you already have a LinkedIn profile, all you need to do is submit a request to join one or all of the following groups:

Water Environment Federation (Main) | Biosolids | Collection Systems | Nutrients | Stormwater 
Utility Management | Water Reuse | Water for Jobs | Watershed Management | Laboratory Practices 

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BR ammonia removal
FC Koch
Posted: Thursday, May 3, 2012 1:17 PM
Joined: 8/29/2011
Posts: 1

Looking for reason why NH3 increases during the settle and decant cycle in a SBR.
Robert Smith
Posted: Wednesday, June 6, 2012 9:05 AM
Joined: 10/8/2009
Posts: 5

Decay of microbes is occurring at all times resulting in release of cell contents, including ammonia.  The ammonia is oxidized under oxic conditions during the aeration of the tank masking this release.  When the air is shut off during the settle and decant stages, the ammonia accumulates because it is not oxidized.