So I conducted a settled solids test got a good result and then walked away for an hour or so. Usually I empty the graduated cylinder but not this time. Came back to take another sample and all the floc that was on the bottom of the cylinder had risen to the top?
We having issues with our clarifier and I was wondering if the floating floc observed in the settled solids test may have anything to do with it?
Leaving a sample on the counter it is warming and it can lead to some of the sludge floating after a while.
An increased development of filamentous microorganisms causes two extremely undesirable phenomena:
- Bulking sludge
- Floating sludge
Those are the reason I can see but there can be others.
What are the issues with your clarifier? Do you have floating sludge?
I'm guessing this was from the temperature then. Thanks!
The clarifier wasn't settling right, blanket was weak and watery. Chemicals have been changed significantly and we found one of our drain vales wasn't seating correctly so that has helped things.
Possible change in temperature caused gases to expand and displacement went from negative to positive. Grab two samples and keep one in a cold water bath and put the other on the counter. What are the issues with the clarifier?
Denitrification can cause floating solids, as they rise with the nitrogen bubbles