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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MBBR Shutting down a reactor
Posted: Wednesday, April 10, 2013 12:25 PM
Joined: 10/23/2009
Posts: 2

We have five MBBR reactors designed to handle peak flow. Under normal flow (which is below annual average) we can live by with two reactors in operation. To save energy costs needed for mixing, we can shut-off three reactors. However we are not sure for how long we can shut them down without significantly affecting the performance potential i.e. will the microbes starve to death or get detached from the media if we shut off the flow and methanol to the reactors for 24 hours?


The idea is to schedule a rotating cycle for five reactors so that two are always be in operation and three are in standby. The question is: what is the longest standby period? Few hours or few days?


If somebody has tried this before or has some knowledge please share.


Thank you.

Dilli Neupane