Beer taste sour

[Ninoid]

I used to use Chemipro OXI for disinfection and sometimes the beer tasted like vinegar. Since I have been using Chemipro SAN or Starsan, even with the same plastic fermenter in which the beer went bad before, this has never happened to me again. I wash the fermenter with hot water and spray it with Starsan and close it well. At the beginning of brew, I open it and dry it well and spray it again with Starsan ten minutes before decanting the wort and throw out the Starsan immediately before decanting. A little Starsan that remains in the fermenter is not a problem.

 

[FeLiXXX]

After 2 weeks in fermenter I transferred both to keg. I clean kegs with oxi and sanitise both with starsan.
So far everything is ok...I put one keg in kegerator to 1.5psi to carbonize it...fingers crossed

 

[FeLiXXX]

After 2 weeks in fermenter and 3 days in kegerator beer is super delicious
No infection at all

 

[IslandLizard]

I put one keg in kegerator to 1.5psi to carbonize it

Do you mean 15 psi, perhaps?

 

[FeLiXXX]

Sorry 1.5 bar

 

[ncbrewer]

After 2 weeks in fermenter and 3 days in kegerator beer is super delicious
No infection at all

I'm glad it turned out well, but it seems weird to me. Never had that happen myself. I'm hoping someone can comment on what might be going on with it.

 

[Ninoid]

After 2 weeks in fermenter and 3 days in kegerator beer is super delicious
No infection at all

I've had several cases like this, and those beers have never improved over time. Maybe you didn't have contamination after all.