Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Is my washed yeast cake contaminated?
Reply
 
LinkBack Thread Tools
Old 02-29-2008, 02:50 PM   #1
gonzo brewer
Feedback Score: 0 reviews
 
gonzo brewer's Avatar
Recipes 
 
Join Date: Jun 2007
Location: Santa Clarita, CA
Posts: 260
Liked 1 Times on 1 Posts

Default Is my washed yeast cake contaminated?

I have started to harvest my yeast cakes and plan to re-use one this Sunday. This morning I took my WLP-001 out of the fridge to warm up to room temp. I plan to make a starter with this tonight.
There is a thin layer on top that I believe should not be there. The other 3 yeast cakes I harvested do not have this. It should be the tan colored yeast on the bottom 1/4 and clear liquid on the top 3/4, right?

Is it possible this washed yeast is contaminated?

My process for harvesting is using 1 quart of DI water, mix in carboy over yeast cake and let settle for 15 min. Pour into 2 quart glass bowl (cover with alum foil) and let settle for 15 min. Pour into 1 quart plastic juice bottle, cap and place in fridge. I used star san on everything.

__________________
Primary:Black Friday Pale
Secondary:
Bottled: Founder's Breakfast Stout, Preto Branco (Black Orchard clone)
Kegged:Brown, WCIPA, orange cascade, Amber, Vanilla Porter
On Deck: APA, RyeIPA, Kolsch
gonzo brewer is offline
 
Reply With Quote Quick reply to this message
Old 02-29-2008, 03:16 PM   #2
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 2 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,023
Liked 984 Times on 656 Posts
Likes Given: 28

Default

It's the pour out of the carboy that is suspect. If you use a traditional stopper that slides inside the neck, there's probably some nasties on the lip of the carboy. Did you do anything to sanitize this area before pouring anything in or out? I like to pump the slurry into a sanitized jar using the autosiphon. It's not a big deal since I'm already using it for the beer. I just leave a 1/4" of beer behind to loosen up the yeast first.

__________________
BrewHardware.com
Sightglass, Refractometer, Ball Valve, Weldless bulkhead, Thermometer, Decals, Stainless Steel Fittings, Compression Fittings, Camlock Quick Disconnects, Scale, RIMS tube, Plate Chiller, Chugger Pump, Super Clear Silicone Tubing, and more!

New Stuff?
Bobby_M is offline
 
Reply With Quote Quick reply to this message
Old 02-29-2008, 03:27 PM   #3
gonzo brewer
Feedback Score: 0 reviews
 
gonzo brewer's Avatar
Recipes 
 
Join Date: Jun 2007
Location: Santa Clarita, CA
Posts: 260
Liked 1 Times on 1 Posts

Default

I don't use the traditional stopper, I use the Carboy Cap that seals around the outside of the carboy spout.
No, I did not spray star-san on the inside of the carboy before pouring.
I don't have an auto-siphon. I use a regular racking cane and blow into an in-line filter to start my siphon.

So... would you toss this or use it. Is there a way to test by smell??

__________________
Primary:Black Friday Pale
Secondary:
Bottled: Founder's Breakfast Stout, Preto Branco (Black Orchard clone)
Kegged:Brown, WCIPA, orange cascade, Amber, Vanilla Porter
On Deck: APA, RyeIPA, Kolsch
gonzo brewer is offline
 
Reply With Quote Quick reply to this message
Old 02-29-2008, 03:52 PM   #4
scottfro
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2006
Location: Vancouver, BC
Posts: 258
Default

you could always make a starter with it and taste it....

__________________
Primary:

Secondary:

Bottled:
#30 Chocolate Porter
#27 Smoked Ale
#26 Hard Apple Cider (Champagne Yeast)
#25 Big Als' Blackberry Brew 2008
#15 Hard Apple Cyser

Kegged:
#31 Field Hand Hefeweizen

http://www.deterrabrewing.com/forum <-- Vancouver Homebrewing Network
scottfro is offline
 
Reply With Quote Quick reply to this message
Old 02-29-2008, 04:18 PM   #5
ohiobrewtus
Feedback Score: 0 reviews
 
ohiobrewtus's Avatar
Recipes 
 
Join Date: Nov 2006
Location: Ohio
Posts: 7,814
Liked 37 Times on 35 Posts
Likes Given: 4

Default

I'd be a bit concerned if there's a thin layer on the top. What color is this layer? Has it formed a 'skin' on the top?

__________________
Quote:
Originally Posted by the_bird
Well, if you *love* it.... again, note that my A.S.S. has five pounds.
ohiobrewtus is offline
 
Reply With Quote Quick reply to this message
Old 02-29-2008, 04:57 PM   #6
gonzo brewer
Feedback Score: 0 reviews
 
gonzo brewer's Avatar
Recipes 
 
Join Date: Jun 2007
Location: Santa Clarita, CA
Posts: 260
Liked 1 Times on 1 Posts

Default

So, If I make a starter tonight then taste it in say 36 hours.. if it doesn't taste sour then it is safe to pitch? I've never tasted a starter so I'm not sure what to expect. I supose since WLP-001 is a netrual flavor it should taste like wort.

__________________
Primary:Black Friday Pale
Secondary:
Bottled: Founder's Breakfast Stout, Preto Branco (Black Orchard clone)
Kegged:Brown, WCIPA, orange cascade, Amber, Vanilla Porter
On Deck: APA, RyeIPA, Kolsch
gonzo brewer is offline
 
Reply With Quote Quick reply to this message
Old 02-29-2008, 04:59 PM   #7
gonzo brewer
Feedback Score: 0 reviews
 
gonzo brewer's Avatar
Recipes 
 
Join Date: Jun 2007
Location: Santa Clarita, CA
Posts: 260
Liked 1 Times on 1 Posts

Default

Quote:
Originally Posted by ohiobrewtus
I'd be a bit concerned if there's a thin layer on the top. What color is this layer? Has it formed a 'skin' on the top?
This layer is a little darker tan than the yeast color at the bottom. It does have a skin over look, similar to the look of the beginning of hydrating dry yeast.
__________________
Primary:Black Friday Pale
Secondary:
Bottled: Founder's Breakfast Stout, Preto Branco (Black Orchard clone)
Kegged:Brown, WCIPA, orange cascade, Amber, Vanilla Porter
On Deck: APA, RyeIPA, Kolsch
gonzo brewer is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Washed yeast...Now how to use?? timmystank General Beer Discussion 17 11-01-2009 04:59 PM
QUICK! HELP! Is my WL Yeast Sample Contaminated? imaguitargod Recipes/Ingredients 3 09-13-2009 08:36 PM
Yeast Isolation from Contaminated Batch Scut_Monkey Brew Science 5 06-26-2009 03:43 AM
Top Cropped vs Cake Washed Yeast cactusgarrett General Techniques 2 06-17-2009 04:45 PM
Banana flavor - Contaminated yeast? Aust1227 General Techniques 12 04-15-2008 02:24 PM