hoping someone out there has experience with this...i have read all previous threads and still have no answer...
plate and frame filtration, using af50 filtrox pads, same as i have done for YEARS, and suddenly 2 separate batches, one an amber and one a kolsch, will not clarify thru the filter...by-pass or 'leakage'. same yeast, which is getting a few gens past it's prime, in both beers.
pads are in correctly, one bar pressure with a slight differential, tanks at 8 psi, all the usual filtration technique is correct. it is impossible for the beer to get from the sludge side to filtrate side without passing through the pads.
so here is the kicker...i threw in seitz k100's, and it worked, athough the micron rating is one and so the filter clogged after about 6 bbls...the issue is that the af50's have worked time and time again, and now suddenly they didn't....and it was yeast getting through because i let a sample sit in a glass overnight and there was yeast on the bottom the following day...
can yeast suddenly mutate and shrink in size? the beer tastes great so no infection...and filtering at 32f so shouldn't be chill haze...i spoke to the filtrox rep and he has to contact switzerland because he is unsure of the problem...
and help or feedback is appreciated...i have no hair left....
cheers,
brian
plate and frame filtration, using af50 filtrox pads, same as i have done for YEARS, and suddenly 2 separate batches, one an amber and one a kolsch, will not clarify thru the filter...by-pass or 'leakage'. same yeast, which is getting a few gens past it's prime, in both beers.
pads are in correctly, one bar pressure with a slight differential, tanks at 8 psi, all the usual filtration technique is correct. it is impossible for the beer to get from the sludge side to filtrate side without passing through the pads.
so here is the kicker...i threw in seitz k100's, and it worked, athough the micron rating is one and so the filter clogged after about 6 bbls...the issue is that the af50's have worked time and time again, and now suddenly they didn't....and it was yeast getting through because i let a sample sit in a glass overnight and there was yeast on the bottom the following day...
can yeast suddenly mutate and shrink in size? the beer tastes great so no infection...and filtering at 32f so shouldn't be chill haze...i spoke to the filtrox rep and he has to contact switzerland because he is unsure of the problem...
and help or feedback is appreciated...i have no hair left....
cheers,
brian
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