What should the pH value be after adjustment inorder to get ph of 6.8 - 7.2 in UASBR ?

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What should the pH value be after adjustment inorder to get ph of 6.8 - 7.2 in UASBR ?

Currently I adjust the pH around 7 but inside the reactor it increases to around 8. What buffers can be added for the same.

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A. G. Piyal Aravinna

Dear Alok R Singh,

It is bit difficult to maintain pH exactly at 7, But you can maintain around 6.85 using the mixture given below. But you have to think about the impact of PO4 to your system. if there is a problem with that mixture, you have think about other mixture.

Abhijeet Singh

Increasing pH means you have increasing ammonia concentration. If you don't check the increase, you might upset the system resulting in failure.

https://www.researchgate.net/post/How_to_neutralize_VFA_in_a_biogas_digester

Khalid Turki Rashid

Dear Alok R Singh you can use the link below

https://aem.asm.org/content/49/6/1472.full.pdf

Regards