RSS Feed Print
floating sludge problem
Posted: Thursday, April 22, 2010 10:19 PM
Joined: 4/22/2010
Posts: 2



We have air extended plant, suddenly begin to appear a floating sludge at aeration and settlement tanks. The appearance of this sludge look like a clod of earth with a gelatinous consistency, and appear in a regular hour.

The oxygen in aeration tanks is ok.


Any clue about what could cause this.



Posted: Saturday, April 24, 2010 6:42 PM

Best guess based on limited info is denitrified sludge. Check your air levels with another probe. If you can (depending on effluent requirements), increase the recirculation from your clarifiers. Another thing I found helpful was to reduce/stop the mixed liqour recirc flow to the anoxic selector. You may want to check your current flows vs. design flows too see if low flows are causing a long retention time in your basins. Good luck!