does thiobacillus denitrificans produce acid?

[Lesley Robertson]

Jesús Garcia-Gil wrote:

> Dear colleagues,
>
> The overall T. denitrificans reaction is:
>
> 8NO3(-) + 3FeS(*)   --> 4N2 + 5SO4(2-) + 4 H2O + 2H(+)
>
> (*) The resuting acid (2H+) is the same, no matter the source of electrons
> used (thiosulfate, metl sulfide or hydrogen sulfide)
>

I wouldn't agree that FeS is the first choice of substrate for the
neutrophiles, although it does occur. H2S is a much easier substrate at these
levels.
Lesley Robertson,
Delft.