Our flagship is a Hefe (okay more of a Krystal) and I am gaining quite a bit of experience with this yeast (WLP300) and I get a sulphur note at two points in the process:
1) I build this yeast up from tube every time and transfer my 'big' pitch into kegs, then pressurise for a short transport....upon venting these kegs at the brewery I get sulphur...
2) After it has been crashed in primary I transfer to brite tank, I also pick up a faint sulphur note
A week or two conditioning at 3-5C seems to take care of it however as I cannot detect it in the finished product.
Is it not just a sign of stress on the yeast - 1) from the pressure, 2) from the drop in temp?
Jeff Rosenmeier (Rosie)
Chairman of the Beer
Lovibonds Brewery Ltd