Unfortunately, pressure fermenting is often misunderstood by even the most astute brewers. The pressure allows the brewer control ester production by letting some of the co2 to stay in solution. It is tool available to brewers and is especially useful for homebrewers since most of our fermenters are shallow and co2 is expelled easily. Deeper or taller fermenters found in bigger breweries will capture the co2 and the hydrostatic pressure (from greater depth) will aid in retaining co2, which keeps the fermentation clean.after talking with Jamil today I will not ferment under pressure
he said the only people who should ferment under pressure are commercial brewers because it speeds up the turn around time doesn't make better beer might even cause harm under pressure initially
I've read that the larger fermenters have inherent pressure do to size and that is one thing that home brewers are trying to simulateUnfortunately, pressure fermenting is often misunderstood by even the most astute brewers. The pressure allows the brewer control ester production by letting some of the co2 to stay in solution. It is tool available to brewers and is especially useful for homebrewers since most of our fermenters are shallow and co2 is expelled easily. Deeper or taller fermenters found in bigger breweries will capture the co2 and the hydrostatic pressure (from greater depth) will aid in retaining co2, which keeps the fermentation clean.
Lagers benefit the most from this technique, especially when a clean palate is the goal. I can find no reason to pressure ferment an ale. The pressure is only detrimental to the yeast if the pressure is excessive or over a prolonged period of time. I found that modest pressure at lager temperatures works the best. 5 to 7.5 psi at 53-55F is the sweet spot for 34/70 yeasts.
I think it's an excellent idea for an Italian Pils, it will get you a clean, crisp beer. Just be careful when adding the dry hop, if it has too much co2 in solution, it could become a volcano.
to add to this, i listened to a podcast on the master brewers podcast about pressure fermentation and ester production. ill find the podcast. the take away was that it noticeably reduces ester production(creates cleaner beer) faster.Unfortunately, pressure fermenting is often misunderstood by even the most astute brewers. The pressure allows the brewer control ester production by letting some of the co2 to stay in solution. It is tool available to brewers and is especially useful for homebrewers since most of our fermenters are shallow and co2 is expelled easily. Deeper or taller fermenters found in bigger breweries will capture the co2 and the hydrostatic pressure (from greater depth) will aid in retaining co2, which keeps the fermentation clean.
Lagers benefit the most from this technique, especially when a clean palate is the goal. I can find no reason to pressure ferment an ale. The pressure is only detrimental to the yeast if the pressure is excessive or over a prolonged period of time. I found that modest pressure at lager temperatures works the best. 5 to 7.5 psi at 53-55F is the sweet spot for 34/70 yeasts.
I think it's an excellent idea for an Italian Pils, it will get you a clean, crisp beer. Just be careful when adding the dry hop, if it has too much co2 in solution, it could become a volcano.
Not completely. I have fermented Wyeast 2124 at 46F with a massive pitch and would get white grape esters about 50% of the time, it was very frustrating. With Fermentis 34/70 I would get a lemon character and to take it to 46F would just stop the yeast (both are Weihenstephan yeasts). But when I put it under pressure at lager temperatures, I found this fruitiness was completely gone, then I discovered that both yeast perform really well at 52-54F when modest pressure is applied.basically a home brewer can take his time and ferment colder and slower to suppress those esters
Awesome podcast. There is a lot of good info from that podcast on a regular bases.masterbrewerspodcast.com episode 230: underpressure
i have had very good luck with Apex Munich Lager and Augustinian Lager. The August is VERY clean when fermented at 15c under 10->15psi.Not completely. I have fermented Wyeast 2124 at 46F with a massive pitch and would get white grape esters about 50% of the time, it was very frustrating. With Fermentis 34/70 I would get a lemon character and to take it to 46F would just stop the yeast (both are Weihenstephan yeasts). But when I put it under pressure at lager temperatures, I found this fruitiness was completely gone, then I discovered that both yeast perform really well at 52-54F when modest pressure is applied.
I haven't look back since and wouldn't do any lager any other way.
Awesome podcast. There is a lot of good info from that podcast on a regular bases.
I thought the 2124 was the Bohemian strainNot completely. I have fermented Wyeast 2124 at 46F with a massive pitch and would get white grape esters about 50% of the time, it was very frustrating. With Fermentis 34/70 I would get a lemon character and to take it to 46F would just stop the yeast (both are Weihenstephan yeasts). But when I put it under pressure at lager temperatures, I found this fruitiness was completely gone, then I discovered that both yeast perform really well at 52-54F when modest pressure is applied.
I haven't look back since and wouldn't do any lager any other way.
Awesome podcast. There is a lot of good info from that podcast on a regular bases.
i would seriously look at apex augustin lager. its very good and clean. also cheap.I thought the 2124 was the Bohemian strain
I could see that with 34 70 since it says fruity on the package
I've been using Diamond from LalBrew better attenuation and floc very clean yeast