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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Influent Composite sample, how representative?
Tom Hons
Posted: Tuesday, November 22, 2011 4:07 PM
Joined: 5/16/2010
Posts: 6


I'm wondering how to make the Influent Composite sample more representative of what's really coming into the WWTP.   One question is how many samples to set the Isco sampler to take.  It's been set in the past to take from 24 to 50 samples,  4 to 16 pulses,  75 to 150 mls.     Depending on flow, it takes about 24 hours  to complete its cycle.    Wondering about going to higher number of samples, less volume.    Thoughts?

Also, for BOD testing, do any of you use a blender on the influent sample and have you found much difference in the results vs. unblended?    Thanx