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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Oxidation Ditch Structural Assesment
Posted: Tuesday, August 17, 2010 11:59 PM
Joined: 7/26/2010
Posts: 8

Hello to All,


At our small WWTP (0.3 MGD) we are looking forward to perform a structural assesment to the oxidation ditch since several months ago we had a very active seismic activity month.


For this same reason, we need to temporarily relocate our sludge contents. We have plenty of space in our emergency basin and it would not be a problem at all. Currently we have an average of 45% volatiles content in our Mixed liquors: in your consideration,


-Should we leave our contents in our Emergency basin and start a new inventory in order to get rid of the high % of inorganics? or,


-Should we just return our sludge back and keep business as usual? we are not experiencing any operational troubles at the time.


Your input is extremely appreciated.

Eric Rajaniemi
Posted: Wednesday, September 22, 2010 2:15 PM
Joined: 10/7/2009
Posts: 10



I would transfer the contents of the ditch to your emergency storage tank, hose ditch down, and do a thorough inspection.  Then you will know for certain whether or not there is any compromise to the tank's integrity.