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| | | Forum Newbie
Group: Forum Members
Last Login: 6/2/2009 3:37:34 AM
Posts: 6, Visits: 47 |
| Hi all ,
I suppose you all know that MBR plants always face the problem of high Foaming in the tanks for various reasons
Iam planning to spray ANTI FOAMING CHEMICAL to dissipate the foam
The details of the chemical is GE- water and process technologies
Foamtrol™ for foaming control
Is it advisable to use , if so what should be the dosing rate ( dilution ) and frequency to apply this Anti foaming chemical
regards
zaffrulla 
zaffrulla |
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| | | Supreme Being
Group: Forum Members
Last Login: 6/5/2009 9:44:58 PM
Posts: 753, Visits: 1,704 |
| | Is your foam caused by bacteria or soap? We had a foaming problem in our digesters and not our MBR tanks. Strange situation. We left it alone and it finally went away when the solids came up. Our MLSS in our MBR's is kept at 12000 mg/l, and we have never had a foaming problem in tis tank. |
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Forum Guru
Group: Forum Members
Last Login: 6/28/2009 4:39:55 PM
Posts: 51, Visits: 84 |
| Understanding the nature and cause of the foam is important. If what you're describing is nocardia foam (short filaments which concentrate on the top of the mixed liquor) adding a chemical generally will not help. Wasting the foam fraction and/or light doses of hypochlorite to kill or at least discourage growth of the nocardia will be more helpful. Nocardia tends to build up at longer sludge ages and is characterized by dark, sometimes "oily" looking foam, with small-medium bubble sizes. Many MBBR's run with long sludge ages so you may very well have this biologically generated foam rather than surfactant induced foam.
Wiff Peterson |
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