---

	FORUM ON BEER, HOMEBREWING, AND RELATED ISSUES
		Digest Janitor: pbabcock at hbd.org


***************************************************************
        TODAY'S HOME BREW DIGEST BROUGHT TO YOU BY: 

         No "sponsor-level" donation yet this year

    Support those who support you! Visit our sponsor's site!
********** Also visit http://hbd.org/hbdsponsors.html *********

DONATE to the Home Brew Digest. Home Brew Digest, Inc. is a 
501(c)3 not-for-profit organization under IRS rules (see the
FAQ at http://hbd.org for details of this status). Donations
can be made by check to Home Brew Digest mailed to (NOTE NEW 
ADDRESS):

HBD Server Fund
PO Box 871054
Canton, MI 48187-6054

or by paypal to address serverfund@hbd.org. DONATIONS of $250 
or more will be provided with receipts. SPONSORSHIPS of any 
amount are considered paid advertisement, and may be deductible
under IRS rules as a business expense. Please consult with your 
tax professional, then see http://hbd.org for available 
sponsorship opportunities.
***************************************************************


Contents:
  Re: Acetobacter? (Adam Arndt)


* * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*   Beer is our obsession and we're late for therapy!   *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * *

NOTE: With the economy as it is, the HBD is struggling to 
meet its meager operating expenses of approximately $3500
per year. If less than half of those currently directly
subscribed to the HBD sent in a mere $5.00, the HBD would
be able to easily meet its annual expenses, with room to 
spare for next year. Please consider it.






Financial Projection as of 31 May 2013
***      Condition:  Cautiously Optimistic      ***
501(c)3 status rescinded. Refiled 1023 for retroactive 
status 25 June 2012. Per the IRS, our case must be 
assigned to an agent. IRS is currently assigning 
applications received in March 2012. Ours was received
in late June. To current financials, HBD is officially 
bankrupt in August. Due to recent developments, HBD.org 
will likely have to be dissolved per the bylaws once 
funding runs out. 
       Projected 2012 Budget  $3,145.01
 Expended against projection  $1,586.99
      Unplanned expenditures ($  152.00)
Projected Excess/(Shortfall) ($   89.84)

As always, donors and donations are publicly acknowledged
and accounted for on the HBD web page. Thank you.

Send articles for __publication_only__ to post@hbd.org

If your e-mail account is being deleted, please unsubscribe first!!

To SUBSCRIBE or UNSUBSCRIBE send an e-mail message with the word
  "subscribe" or "unsubscribe" to request@hbd.org FROM THE E-MAIL
  ACCOUNT YOU WISH TO HAVE SUBSCRIBED OR UNSUBSCRIBED!!!**
IF YOU HAVE SPAM-PROOFED your e-mail address, you cannot subscribe to
  the digest as we cannot reach you. We will not correct your address
  for the automation - that's your job.

HAVING TROUBLE posting, subscribing or unsusubscribing? See the HBD FAQ at
http://hbd.org.

LOOKING TO BUY OR SELL USED EQUIPMENT? Please do not post about it here. Go
instead to http://homebrewfleamarket.com and post a free ad there.

The HBD is a copyrighted document. The compilation is copyright 
  HBD.ORG. Individual postings are copyright by their authors. ASK 
  before reproducing and you'll rarely have trouble. Digest content 
  cannot be reproduced by any means for sale or profit.

More information is available by sending the word "info" to 
req@hbd.org or read the HBD FAQ at http://hbd.org.

JANITORs on duty: Pat Babcock (pbabcock at hbd dot org), Jason Henning,
                  Spencer Thomas, and Bill Pierce



----------------------------------------------------------------------


Date: Thu, 5 Sep 2013 18:59:23 +0000
From: Adam Arndt <adama at microsoft.com>
Subject: Re: Acetobacter?

Date: Sun, 1 Sep 2013 11:06:18 -0400 (EDT)

From: "Darrell G. Leavitt" <leavitdg at plattsburgh.edu>

Subject: Acetobacter?

Anyone here know how to identify "acetobacter"?

I just bottled a 007 Amber Ale and along the top inside of the fermenter was
a white scum.

Since I have seen a bunch of fruit flies in the brewhaus, I wonder if this
could be acetobacter?

I can send several pictures if anyone wants to see them.

The ale tastes good, but I wonder what this white scum is.

Darrell

If you've got a microscope it's relatively easy. Acetobacter are short
stubby rods and grow in pairs or longer chains.

It normally forms a "skin" on the surface that vinegar producers call
"mother of vinegar".  They can grow pretty quickly and drop the ph of
finished beer rather quickly in the presence of any oxygen.  If you have
fruit flies in the brew house the likelihood that this is your culprit shoots
up very quickly. Acetobacter can make beer cloudy, too.

You can search for acetobacter colony photos to try and compare to what
you're seeing; there are some free images available although most of the
one's I've found are pay-only or require a subscription...

Electron Microscope Image:
http://microbewiki.kenyon.edu/index.php/File:Acetobacter_aceti.jpg

Adam

Return to table of contents

---