# Acid neutralization [closed]

I am working on a biogas plant, digester volume 3000 liter, right now pH condition is acidic at 4.00 my requirement is to maintain pH to 6.50 to 7.20 what should I do? some suggestions are there like, add NaOH or CaCo3 but I am confused about the how much amount should I add to increase pH

## closed as too broad by a-cyclohexane-molecule, Mithoron, A.K., airhuff, MaxWAug 4 '18 at 19:39

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• There has to be information on web about biogas digesters. What kind of gunk are you even digesting? // Off the top of my head I'd think adding anything willy nilly to the digester would be tedious at best. Seems like you need to take a sample, treat that, and then use sample size to scale up additions. // Part of the problem here is $\ce{Na+}$. I'd suspect that microbes aren't going to like high $\ce{Na+}$ concentrations from NaOH or NaHCO3. So you need a biofriendly base. – MaxW Aug 2 '18 at 14:01