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Low pH in Clarigester

Low pH in Clarigester

Low pH in Clarigester

Hello All,
I've come across a treatment plant in upstate NY that has a problem with their Clarigester. The pH in the Clarigester dropped from 6.3 to 5.5. There is also a sweet odor emitting from the Clarigester which is indicative of the low pH.
Would anyone know a possible cause along with a fix or solution to this problem?

RE: Low pH in Clarigester

Aside from mechanical failure, the two most likely causes of
digester process failure are:
• metabolic overloading of the micro-organisms and consequent
pH drop; and
• loss of biomass.

Addition of lime will be necessary to raise the pH to an optimum operating range.




RE: Low pH in Clarigester

Since I can find out the Alkalinity and Volume of the Clarigester, is there a way to determine how much lime to add to raise the pH?

RE: Low pH in Clarigester

The alkalinity is test is very inexpensive.

Short of that, experiment by adding lime. Lime is also inexpensive.

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