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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Reseeding Nitrification/Denitrification Oxidation ditch
Shannon Taylor
Posted: Thursday, August 18, 2011 2:28 PM
Joined: 6/11/2010
Posts: 1


We have lost nitrification in our oxidation ditches. We are looking to reseed with local WAS from another plant. Any tips regarding quantity of WAS to import or process control settings while adding new bugs. Thanks.


Greg Gress
Posted: Friday, August 19, 2011 10:46 AM
Joined: 6/23/2010
Posts: 5


Shannon, Stop wasting. Where do you normally wast to? If aerobic digester then use this as your seed. Why did you loose nitrification? Quantity of seed would depend on volume of ditch. I would suggest 20% of ditch volume to start with.