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| | Anybody ever heard of adding a small dose of a hydrated lime/water sollution into the sludge feed to reduce the "sticky factor" to the discharged sludge? |
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| | Not an answer to your question but related to Centrifuge operations, anyone running at 1900 rpms due to fecal regrowth concenrs with ultimate land disposal who has figured out how to make a centrifuge designed for 2300 work as well at 1900? Completely manual operation, no autotorque etc. If you are in the same boat looking at these issues curious what you are doing. RIch |
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| I'm curious what your % Total Solids are running. Beyond getting good %TS and good capture there are qualitative elements to the cake which offer themselves in fine tuning the centrifuge operation, i.e. trying to produce a cake that is more easily conveyed. Years ago, it was not unusual to use lime with centrifuges, and adding some hydrated lime might work, although I would worry a bit about impact of any grit in the lime on the centrifuge itself. Might want to discuss with manufacturer's tech support line before trying it. You may find experimenting with poly dose gets you to an optimum place with respect to reducing stickiness also and might be safer.
Wiff Peterson |
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Last Login: 7/21/2008 2:36:47 PM
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| To answer two questions at once:
I have not heard of adding a small amount of lime to change the consistence of sludge, other than with alum sludge. Using lime to change the texture of clay like materials is well known in construction areas, just not used much at all in water and wastewater.
As to operation at lower speeds. All optimization starts with the constraints. Yours is RPM.
1 In general, deeper ponds result in better efficiency. The polymer addition point is also important. Start with the one you have, and add another addition point 40 feet away. It will either be better, or worse. If better, try another one an additional 40 feet away. If worse, add more in the opposite direction.
peter@thecentrifugeguys.com |
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| | | Junior Member
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Last Login: 7/21/2008 2:36:47 PM
Posts: 14, Visits: 16 |
| To answer two questions at once:
I have not heard of adding a small amount of lime to change the consistence of sludge, other than with alum sludge. Using lime to change the texture of clay like materials is well known in construction areas, just not used much at all in water and wastewater
As to operation at lower speeds. All optimization starts with the constraints. Yours is RPM. In general, deeper ponds result in better efficiency. The polymer addition point is also important. Start with the one you have, and add another addition point 40 feet away. It will either be better, or worse. If better, try another one an additional 40 feet away. If worse, add more in the opposite direction.
See your poly vendor, they may have a polymer that works better at the lower speed.
you are welcome to call and discuss the problem as it is not a simples question
Peter LaMontagne, 215 348 7870 Peter@thecentrifugeguys.com
peter@thecentrifugeguys.com |
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