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Sludge Clumps on Clarifier Surface (Read 86 times)

kimmy

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Sludge Clumps on Clarifier Surface
Jul 20^th, 2012, 11:11am

Hello everyone. If I haven't said it before, I Love this forum. I have gotten loads of good advice from ppl. Thanks so much.

Now, I am concerned with the clumps of sludge on the surface of my clarifiers. No air bubbles coming off and no ashing. At present my:

Sludge Age = Cl#3=13 days and Cl4= 12 days
MLSS is 4253 and 3965
SVI is 84.6 and 80.7
RAS rates are at 34 gpm which is 114%.

I have wasted only once this week since the MLSS is staying relatively constant. Different references vary on what a good sludge age for an extended aeration plant is. I am working from one that says >20 days. Bug counts from the lab indicate a younger sludge.

What can I do to get rid of the clumps? Cool

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NorCal_Wastewater1

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Re: Sludge Clumps on Clarifier Surface
Reply #1 - Jul 20^th, 2012, 2:13pm

Have you performed a microscopy exam of the sludge?

Typically when sludge starts appearing on the surface of a clarifier it has gone into De-nitrification. (De-nite) and this is caused by some form of filamenteous in the sludge.

There are several members of the forum who can ssist you further:

Victor Santa Cruz
Dr. Bug
DS
CGillen
Dr. Sobisch

Are all members with whom you can consult further. There are others too, these names come to mind right away.

Dallas

Have a great day,

Dallas

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