Chill Haze Biofine Clear Issues

[wilmoorm]

Recently our beer has been producing some chill haze. The only thing we've changed is our base malt from Maris Otter to Northwestern Pale. We've been using Biofine Clear without many hiccups over the last ten months and suddenly three batches refuse to clear. We've recirculated while dosing inline for half an hour post fermentation and cold crash. We've dosed inline on the way to the brite. We've dose multiple times per batch without any results. We're using a rate of 100 ml per bbl.

We'd love to hear any ideas you guys have for combating chill haze or dosing techniques for Biofine Clear.

Cheers,
Will
Tow Yard Brewing Co.

[TonyT]

Our malt supplier told us that some weather conditions prior to harvest caused the 2014 crop of domestic 2 Row to have a higher than usual protein content, which will likely result in increased haze. We're using GW 2-Row and have noticed a bit more haze in the past few months in beers that would have previously dropped super bright with finings.

I didn't really look into it any further than what he told us, but it seems to align with your switch from UK malt to domestic...

[AnthonyB]

Sounds like a job for.... Clarity-Ferm! (or step-mashing)

[Randy.Cockerell]

Biofine Clear

Have you tried a small scale experiment? If so, did your samples clear? It may be that it needs time, we have found with at least one of our brands that you need several days for it to drop bright.

[TL Services]

Is is actually a chill haze you are seeing, or that the beer isn't fining clear at all? If you have a microscope - or access to one - then it would be worth looking at a fined sample to see whether the haze is yeast, proteinaceous material or something else.

With your change of malt, and especially if there is a known issue with high levels of sensitive proteins, then a change in copper finings might help.