Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Academic Question regarding sanitizing
Reply
 
LinkBack Thread Tools
Old 11-10-2010, 05:12 PM   #1
william_shakes_beer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2010
Location: Maryland
Posts: 1,930
Liked 98 Times on 86 Posts

Default Academic Question regarding sanitizing

Starsan is an example of sanitizers that can be used to sanitize clean surfaces, IE kill bacteria.

Starsan is a no rinse sanitizer and in fact the sanitizing action stops when the product dries.

Yeast is a microscopic creature similar to bacteria

Why is Yeast not killed by sanitizer? Or is the starsan so diluted by the (wort, beer) that it is not longer dangerous to Yeast (and Bacteria?)

__________________
william_shakes_beer is offline
 
Reply With Quote Quick reply to this message
Old 11-10-2010, 05:26 PM   #2
sportscrazed2
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: Dyer,IN, Indiana
Posts: 789
Liked 5 Times on 5 Posts
Likes Given: 1

Default

It's my understanding that the ph of the wort neutralizes the star san. can anyone else confirm this?

__________________
sportscrazed2 is offline
 
Reply With Quote Quick reply to this message
Old 11-10-2010, 05:32 PM   #3
Skaggz
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: Gridley, CA
Posts: 271
Liked 2 Times on 2 Posts
Likes Given: 1

Default

Starsan starts to loose it's effectiveness when the pH gets above 3.0. Since wort/beer pH is higher than 3.0, and since it is only a residual amount of Starsan solution mixed in with the wort/beer it is rendered ineffective.

If you were to pitch your yeast into a concentrated Starsan solution, then they would most likely die. But I'd like to believe those bastards put up a good fight first.

__________________

Primary 1: Apfelwine
Primary 2: Buddy's Brown Porter
Primary 3: "Brown" Hefeweizen (oops?)
Primary 4: Chocolate Stout

Skaggz is offline
 
Reply With Quote Quick reply to this message
Old 11-10-2010, 05:35 PM   #4
sportscrazed2
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2010
Location: Dyer,IN, Indiana
Posts: 789
Liked 5 Times on 5 Posts
Likes Given: 1

Default

Quote:
Originally Posted by Skaggz View Post
Starsan starts to loose it's effectiveness when the pH gets above 3.0. Since wort/beer pH is higher than 3.0, and since it is only a residual amount of Starsan solution mixed in with the wort/beer it is rendered ineffective.

If you were to pitch your yeast into a concentrated Starsan solution, then they would most likely die. But I'd like to believe those bastards put up a good fight first.
someone do an experiment with cheap yeast. maybe bakers yeast
__________________
sportscrazed2 is offline
 
Reply With Quote Quick reply to this message
Old 11-10-2010, 05:36 PM   #5
JonK331
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2009
Location: Fremont, CA
Posts: 2,100
Liked 28 Times on 28 Posts
Likes Given: 6

Default

Well, if you pitched yeast into 5 gallons of starsan, yes it would kill it. Starsan works at a pH of around 2.5, when small amounts are diluted with a higher pH wort, the star san is neutralized. Here's another thread about it:

http://www.homebrewtalk.com/f11/star...hor-ph-176159/

There's also a podcast around somewhere with an interview with Charlie Talley of Star San, that should answer all your questions as well.

__________________
JonK331 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
Sanitizing Question Colin86 Beginners Beer Brewing Forum 6 11-10-2010 02:54 AM
Sanitizing question MrBungle Beginners Beer Brewing Forum 7 11-24-2008 11:50 AM
sanitizing question JBrady Beginners Beer Brewing Forum 13 06-22-2007 07:15 PM
sanitizing question tim1970 Beginners Beer Brewing Forum 14 03-06-2007 04:28 PM
Sanitizing question winter999 Beginners Beer Brewing Forum 7 08-23-2006 05:38 PM