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#50 Jopenbier

1,459 calories 123 carbs
Beer Stats
Method: All Grain
Style: Clone Beer
Boil Time: 60 min
Batch Size: 11 liters (fermentor volume)
Pre Boil Size: 25 liters
Pre Boil Gravity: 1.177 (recipe based estimate)
Efficiency: 80% (brew house)
Calories: 1,459 calories (Per 355mL)
Carbs: 123 g (Per 355mL)
Created Tuesday October 13th 2015
1.402
1.092
40.75%
48.48
15.26
n/a
n/a
 
Fermentables
Amount Fermentable PPG °L Bill %
17 kg German - Pale Ale17 kg Pale Ale 39 2.3 100%
17 kg Total      
 
Hops
Amount Variety Type AA Use Time IBU Bill %
50 g Southern Star50 g Southern Star Hops Pellet 12.6 Boil 75 min 48.48 100%
 
Mash Guidelines
Amount Description Type Temp Time
L -- 64 °C 60 min
Starting Mash Thickness: 3 L/kg
 
Yeast
- -
Amount:
1 Each
Attenuation (avg):
75%
Flocculation:
Med
Optimum Temp:
19 - 22 °C
Starter:
No
Yeast Pitch Rate and Starter Calculator
 
Notes

mash 64-66C, left for the whole night. First running-offs collected, the rest went for distillation. 6-hour-long boil.
gravity around 1.220, but it is out of scale. 1H NMR doesn't give an answer. Try to evaporate a sample to check what is the sugar content.
Evaporation (60°C, 7days, air circulation) of 50g sample left 25g solids;this means that the wort was 50°P which equals 1.233 g/cm3.
Fermenter was left open @20°C, fermentation picked up after 3 days (!). 15.10.2015

Warto poznać za fundamentalną pracą G.E. Habicha pt. Schule der Bierbrauerei (szkoła browarnictwa)[2]:

Z 1000 kg słodu i 5 kg chmielu produkowane jest około 10,5 hl (1050 litrów) piw

piwa jopejskie trzeba było bardzo szybko schłodzić
By zapewnić naprawdę szybkie parowanie gorącego wywaru przelewano go w duże płaskie kadzie
Wydobyte z pleśniowych jaskiń piwo filtrowano, beczki zamykano, ale proces dalszej, już bardzo powolnej i spokojnej fermentacji trwać musiał jeszcze cały rok

Warto dodać, bo nie wszyscy o tym mówią, że było to także kwaśne piwo. Poziom kwasu mlekowego był całkiem duży, na poziomie około 2% – czyli tak jak w lambicu. Jednak tutaj zostawała olbrzymia ilość cukrów resztkowych, więc kwaśności nie było aż tak czuć
Jakość tego wyjątkowego piwa była rzekomo testowana w bardzo oryginalny sposób. Otóż zawartość pierwszego kufla wylewano na ciężką drewnianą ławę, na której następnie siadali piwosze, by błyskawicznie się podnieść. Jeśli ława unosiła się wraz z nimi, można było kontynuować konsumpcję. Można się zastanawiać, ile prawdy jest tym zwyczaju, ponieważ podobne procedury istnieją w Bawarii – jeśli piwosz w skórzanych spodniach przyklei się do oblanej piwem ławy, oznacza to, że trunek jest odpowiednio treściwy.
http://akademia-piwa.pl/index.php?option=com_content&view=article&id=66:piwo-jopejskie&catid=35:historia-piwowarstwa&Itemid=27
Dzięki dziełu „Schule der Bierbrauerei” autorstwa G. E. Habicha, opublikowanemu w 1865 r., możemy poznać kilka technicznych szczegółów produkcji.

Zacieranie odbywało się metodą infuzyjną, zaś obciągniętą brzeczkę gotowano czasem nawet do 20 godzin, aby osiągnąć pożądaną gęstość. Dzięki tym zabiegom z 1000 kg słodu i 5 kg chmielu uzyskiwano ok. 10,5 hl zielonego piwa

http://barclayperkins.blogspot.co.za/2014/06/danziger-jopenbier-again.html

Top-fermented beers, especially Danziger Jopenbier, are discussed by P. Mumme (W. Brauer, 1906, 13). This is a top-fermented, highly concentrated beer, which is seen and drunk more abroad than at home where often not even its name is known. The peculiar smell and taste, reminiscent of port wine, the production methods, fermentation and treatment give Jopenbier something characteristic, because it greatly differs from all other top-fermenting beers from and stands alone in its type. - The wort is left to sponataneously ferment. First of all a thick blanket forms on the surface on which all sorts of moulds grow. These blankets in various vats are again very different from each other in appearance and strength, depending on the points of attack the moulds have found. Gradually, the yeast has developed so that it is able to cause fermentation. - The head, which is often so strong that a 20 gram piece won&#039;t fall through it, begins to lift itself. - This is the time when the vats must be covered, because after 2 to 3 days a very vigorous fermentation begins. Before the mould layer has risen to avoid it collapsing. The lids have at the front a wide, somewhat overhanging outlet; through this channel, for 8 to 12 days the beer often pushes out large amounts of loose foam, which is collected in barrels or tubs placed below, until the primary fermentation calms and peaceful secondary fermentation takes place. The foam subsides, the ejected, very bitter beer is filled after the lid is lifted, and the tub is left to itself again. Now in long-lasting secondary fermentation and slow clarification take place, during which the sediment settles. - An analysis of Jopenbier revealed :<br />



Alcohol 	3.52%<br />
Real extract 	45.04%<br />
Apparent extract 	43.20%<br />
calculated OG 	49.94%<br />
apparent degree of attenuation 	13.49%<br />
Real degree of attenuation 	9.81%&quot;<br />
&quot;Jahresbericht über die Leistungen der chemischen Technologie (1907)&quot;, 1907, pages 352 - 353. (My translation.)<br />


49.94º Plato is 1230º in SG. The finishing gravity is 1195º. That's quite an achievement having an FG higher than the OG of a Scottish 160/- Ale.

What can you say about the fermentation, other than that it sounds scary and disgusting at the same time. I wonder what it was that caused the fermentation. The slime sounds like some sort of bacteria, despite being described as mould. Did Saccharomyces play any part in the fermentation?

From the comparison to port wine, it sounds like there was both some acidity and considerable sweetness in the finished beer. Given the description of the fermentation, it would be a miracle if there were no trace of sourness

http://www.chmielowisko.pl/2015/02/04/jopejskie-czy-to-jeszcze-piwo/

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  • Last Updated: 2016-10-27 12:50 UTC
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