HOMEBREW Digest #4868 Wed 12 October 2005

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  oysters & beer (Bob Devine)
  CO2 Safety ("Michael Maag")
  Kunze, Modeling, Process literature, deClerk (David Harsh)
  Post your location (Jeff Renner)
  Teach A Friend To Homebrew Day ("Gary Glass")
  Re: Comments re HBD 4866 (Scott Alfter)
  Any Wilmington, NC folks heading to the Lighthouse International Beer Festival? ("Chris Horner")
  Tinyurl (was: Comments re HBD 4866) ("Greg 'groggy' Lehey")

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---------------------------------------------------------------------- Date: Tue, 11 Oct 2005 22:48:25 -0600 From: Bob Devine <bob.devine at worldnet.att.net> Subject: oysters & beer Bill Velek wrote: > Brad: I've read about real oysters being added to an > "Oyster Stout" (IIRC it was from Michael Jackson) Never underestimate what adjuncts or flavorings have been tried in brewing. Somehow stout is one style that has had variety of additions -- milk sugar, coffee, oatmeal, licorice, maybe even Rocky Mountain oysters... This might be the column you remember: http://www.beerhunter.com/documents/19133-000740.html A label proclaiming oysters http://www.beers-of-the-world.com/brands/detail/oyster_stout.764.html Other brewers have used ground shells from oysters as fining agents. Such shells are somewhat like diatomaceous earth -- the particles are small, rough, and good for capturing small particles. Shells are also somewhat alkaline. Bob Devine, Riverton UT Return to table of contents
Date: Wed, 12 Oct 2005 07:26:47 -0400 From: "Michael Maag" <MichaelMaag at doli.virginia.gov> Subject: CO2 Safety I am posting this alert now that the cold weather is on the way, and the case has been closed. A fatality occurred in SW Virginia last winter when a Pepsi employee was delivering a 20 lb CO2 tank to a customer. He had placed the CO2 tank in the cab of the truck near the heater vent. The heater vent blew air at at 150F. The CO2 tank had been overfilled. The increase in internal tank pressure due to the heat caused the frangible disk to rupture, and the entire tank contents filled the cab. The victim was unconcious before he could roll down the window, and died. The vehicle was found stalled on the shoulder of the road. Brew Safely Mike Maag, Va. OSHA Return to table of contents
Date: Wed, 12 Oct 2005 10:03:15 -0400 From: David Harsh <dharsh at fuse.net> Subject: Kunze, Modeling, Process literature, deClerk Greetings- I'll stop after this, I promise. On Kunze- I don't own a copy of Kunze (but maybe I'll check the library), but the posted passaged seemed to me to be very poorly translated and perhaps it could be stated more clearly. However, I think Steve A. correctly interpreted what was written. - ----------------- To model the sparge- A proper sparge model has to account for both diffusion and convective issues. Dave Burley and I discussed this several years ago and although he used different terminology, we described it as the same basic processes: 1. Diffusion in the liquid phase (I'm pretty sure we could neglect this) 2. Convective mass transfer from the liquid phase to the particles 3. Diffusion in the particle phase (the Fickian process) Physical data needed: -Equilibrium data (sorption isotherm, partition coefficient, whatever you want to call it) -Bed characteristics (particle "size", porosity, sphericity, all that) -Diffusivities for the solute in the bulk and particle phases. Hinds gives solutions of the model for varying limited resistances and references a solution for combined resistances. Although derived for a sorption process, it is easily applicable to a desorption process. Many other mass transfer references will probably present the same solutions if one is interested and can't find a copy of Hinds (Bennett and Myers; McCabe, Smith and Harriot, anything on that part of the library shelf!) And this is for transfer of ONE solute. Multiple solutes do not allow an analytical solution. - ---------------- What does process literature say? I think Dave Burley and I have seen the same literature over the years and are almost perplexed that anyone would claim that batch processes have an advantage in efficiency over a continuous one. The continuous process maintains a higher average driving force for mass transfer, and that is easily proven. It is not often expressed explicity, but here's a quote from King, Separation Processes (McGraw-Hill1980, p. 173) talking about making coffee for freeze drying: "...Since the water in this extract is subsequently removed by evaporation or freeze-concentration, followed by spray-drying or freeze-drying, there is a large incentive to obtain as concentrated an extract as possible ... In order to obtain this high extract concentration, countercurrent contacting of roast and ground coffee and extract is used .... In this way water always contacts the most depleted coffee grounds first and contacts the freshest grounds last... the process can obviously be extended to any number of beds." So, in effect, I'm saying that Dave Burley is correct when states that Chemical Engineering literature claims higher efficiency for continuous over batch processes. Although I'll point out that this does not state whether a better quality extract is obtained - and my opinion of instant coffee would doubt that, but that's a whole different argument! - -------------------- I do own a copy of deClerk, and here's his take: (the 1994 reprinting by Seibel, page 288 in Volume I) "After the first wort has been run off, sparging is started. Many years ago the spent grains were washed by steeping. Liquor was introduced into the vessel by underletting, and after a a stand, was run off in the same way as the first wort. The terminology used in the obsolete process was "first steep wort" for the first wort, and then second, third and fourth steep worts. In other words, the spent grains were washed by dilution. Today, the spent grains are washed by displacement. Hot liquor is sprinkled over the bed of spent grain from above by means of the sparging machinery in the tub and the bed of spent grains is kept covered with liquor during the whole process. Sparging is a very much more efficient method of washing the spent grains since oxidation is prevented and less liquor is used, an important fact in the brewing of high-gravity beers. " (no references are provided for this text) So I'll close by saying, if anybody ever solves the model or bothers to collect enough data to really prove the point, I'd love to hear about it. But in the mean time, I doubt any of us are going to change from our current methods we consider successful. Dave Harsh Cincinnati, OH Bloatarian Brewing League Return to table of contents
Date: Wed, 12 Oct 2005 10:26:16 -0400 From: Jeff Renner <jsrenner at umich.edu> Subject: Post your location Brewers It's time for my semi-annual request that posters tell us their name and location. It fosters community and might help answer questions you have. Who knows, there might be a homebrewer in your hometown that you never knew about, or maybe someone with the same water problems that he's solved. And for relative newcomers who wonder what this occasional "Rennerian Coordinates" stuff is, it was this request that led to Rennerian Coordinates about eight years ago. See my "The Definitive History of Rennerian Coordinates" at http://hbd.org/hbd/archive/4235.html#4235-4. Jeff - --- Jeff Renner in Ann Arbor, Michigan USA, jsrennerATumichDOTedu "One never knows, do one?" Fats Waller, American Musician, 1904-1943 Calculate your Rennerian Coordinates at http://hbd.org/rennerian_table.shtml Return to table of contents
Date: Wed, 12 Oct 2005 09:15:39 -0600 From: "Gary Glass" <gary at brewersassociation.org> Subject: Teach A Friend To Homebrew Day Calling All Homebrewers! It's time to brew some beer for the greater good. The American Homebrewers Association's 7th annual Teach A Friend To Homebrew Day is coming up on November 5th (always held on the first Saturday in November). This is a day of service.....well, and fun, if it's not fun you're not doing it right.....where homebrewers around the globe gather their non-brewing friends, neighbors, and family to teach them how to brew up some beer. Why? Because more homebrewers = better world to live in! Last year we had 1179 participants from 137 different sites. Help us make this year even bigger. Sites registered before October 23 will be sent copies of Zymurgy for Beginners, our 24-page guide for beginning homebrewers. For details and to register your site see: www.beertown.org/events/teach/index.html. Cheers! Gary Glass, Project Coordinator Brewers Association 888-U-CAN-BREW (303) 447-0816 x 121 gary at brewersassociation.org www.beertown.org Return to table of contents
Date: Wed, 12 Oct 2005 10:14:06 -0700 From: Scott Alfter <scott at alfter.us> Subject: Re: Comments re HBD 4866 Bill Velek wrote: > Boris: One word -- "TinyURL" :-) > Instead of posting a long link and asking people to patch it together, > it would be better to change it, as I have now done for your link, into > this: http://tinyurl.com/96twz . I won't attempt to speak for others, but I very much dislike the posting of such abbreviated URLs. They give no clue as to where they are actually going. For all I can tell, your example link goes someplace offensive like goatse.cx or democrats.org. It would be nice if the HBD didn't pitch a fit on long lines, but reassembling a long URL that's been split takes a minimal amount of time (copy it to a text editor, remove the line breaks, and paste the result into your browser) and leaves no questions about where you're going. With some sites, you can get rid of extra crud in the URL and it'll still work. Consider this link to Charlie Papazian's latest at Amazon.com: http://www.amazon.com/gp/product/0060531053/103-8568819-2801460?v=glance&n= 283155&n=507846&s=books&v=glance All you really need to post is the part up to the book's ISBN: http://www.amazon.com/gp/product/0060531053/ eBay can also have its URLs shortened considerably. Consider this click-through from a search page (disclaimer: this isn't my auction and I don't know the seller; it was just the first result returned in a search for "Cornelius keg"): http://cgi.ebay.com/FOUR-5-five-gallon-keg-homebrew-soda-tank-Cornelius_W0Q QitemZ7552231420QQcategoryZ67137QQssPageNameZWDVWQQrdZ1QQcmdZViewItem Plugging the item number into Firefox's search feature brings back an even longer URL for the same item: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7552231420&ru=http%3A%2F %2Fsearch.ebay.com%3A80%2Fsearch%2Fsearch.dll%3Fquery%3D7552231420%26MfcISA PICommand%3DGetResult%26ht%3D1%26ebaytag1%3Debayreg%26srchdesc%3Dn%26maxRec ordsReturned%3D300%26maxRecordsPerPage%3D50%26SortProperty%3DMetaEndSort%26 fvi%3D1 Only a very small part of this, though, will take you to the same page: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7552231420 Plug in a different item number at the end and you'll get a different item. This is very much a site-specific method for shortening URLs, but it doesn't take much experimentation with a given site to find a method that works (or to find that you can't shorten it, in which case a decent site design means it's not all that long to begin with). _/_ Scott Alfter / v \ Visit the SNAFU website today! (IIGS( http://snafu.alfter.us/ Top-posting! \_^_/ rm -rf /bin/laden >What's the most annoying thing on Usenet? Return to table of contents
Date: Wed, 12 Oct 2005 15:30:52 -0400 From: "Chris Horner" <chrishorner68 at hotmail.com> Subject: Any Wilmington, NC folks heading to the Lighthouse International Beer Festival? Greetings, Finally getting settled in down here on the southern Carolina Coast, and making some free time on the weekends to socialize and meet new folks! Thinking about heading out to Hugh MacRae Park for this. http://www.lighthousebeerandwine.com/2005festival.pdf For me, the 20 bucks is worth it just to catch Colonel Bruce Hampton & the Codetalkers - but I know that's steep if you're not really interested in the music. My dad's in bachelor mode this weekend, so I figured I'd drag him down there - we used to go to GABF behind Dominion Breweries all the time when we lived up north. Anyone here been before? What can I expect for 20 bucks? A sample glass and a few tokens? If any of you are going to be there - or have displays setup there, please let me know - it would be nice to meet some fellow homebrewers. Chris Horner http://db.etree.org/chorner Return to table of contents
Date: Thu, 13 Oct 2005 10:00:59 +0930 From: "Greg 'groggy' Lehey" <grog at lemis.com> Subject: Tinyurl (was: Comments re HBD 4866) On Tuesday, 11 October 2005 at 14:19:05 -0500, Bill Velek wrote: > Boris: One word -- "TinyURL" :-) > Instead of posting a long link and asking people to patch it together, > it would be better to change it, as I have now done for your link, into > this: http://tinyurl.com/96twz . Yes, but will it be there in two years' time when somebody reads the archives? Tinyurl is great for interactive use, but for something in an archive, I'd like to see the original. - -- Finger grog at lemis.com for PGP public key. See complete headers for address and phone numbers. Return to table of contents
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