What Kugeman said. Except without hot water. No reason to heat your cold room. A stand alone jacketed bright beer tank that can be left to cool at ambient for a day might be different if I had free hot water. Acid #5 and #6 are both formulated for cold cleaning. Seems that #5 is more aggressive against beerstone, and #6 is more of an acid detergent. Also had great luck with Ecolab Trimeta, Birko Ultra Niter, and Diversey Acidbrite 9. All of them are fairly new formulations for acid detergent cleaning in a CO2 environment at cold (or ambient) temperatures. NONE of them react with CO2. Rinse, CIP with as little 2% acid as possible without vortexing, rinse, sanitize, maybe rinse again. I can do this without losing much pressure--start at 13.5-14 psi and end up with 10. Also, CIPing a tank under pressure takes NO MORE PUMP PRESSURE than an open tank. The pressure added to your pump discharge due to tank pressure is made up for by the increased suction pressure on the pump suction due to the same tank pressure. I used to follow a hot rinse/hot caustic/hot rinse/acid/rinse/sanitizer/rinse procedure. There have been a lot of brewery cleaning developments since then. No one procedure is good for all breweries. Talk to your chemical representatives and try different procedures.
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What's your SOP for brite cleaning between transfers?
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I break down our 9BBL tanks between every transfer. Parts go into hot water with a bit of phosphoric acid. I rinse the tank before adding a few gallons of kettle water with phosphoric acid, climb in and scrub by hand until every surface is perfect. Rinse again and sanitize. Close it up and purge with CO2 before transferring the beer.
Doing it manually allows me to inspect to make sure it is absolutely clean, and actually takes less time and resources.Jeff Drum - Brewer
San Diego Brewing Co.
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All right. I started with the tank that had the dunkelweizen, knowing that would be the worst. I used 1 oz per gallon of acid cs35 - enerco's acid 5 - per gallon. After three two minute rinses and a ten minute rinse (cold) I emptied the tank, and added the acid and water to cip for thirty minutes. Repeat the rinse procedure, because the runoff was a bit cloudy, and then sanitized with peroxyacetic for thirty minutes. Emptied the water, and then went ahead and opened the manway, after releasing the pressure. The tank was visually clean and shiny. The only issue was a bit of stubborn yeast on the dish bottom of the tank - less than half a cup. Sprayed this out, sealde, resanitized for ten minutes,and did the double five psi purge. Set up took way longer the first time - I kept rearranging the tees and valves, but it worked. In four hours today I cleaned the other three tanks with the same procedure. The dunkel went to the server kind of early, and the other three later, with a more flocculant yeast in the fermentor. I am just finishing up with the transfer of the third beer to my clean tanks. I think I just saved half a fifty pound tank of CO2, if not more.
Oh, the carb stone looked spotless on visual inspection, and is bubbling CO2 into the next batch as I write this.
Promising method, I will keep at it, while being a bit vigilant checking the beers progress in the tanks. Thanks Phillip, Hutch, et al!
DavidLast edited by panadero; 01-17-2013, 03:40 PM.
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Phillip, I think you are right. I should be able to use 1/2 oz per gallon, rather than an ounce per gallon. That is my standard hot use rate. I assumed I might need more going cold, and 1 oz per gallon is only .78%. That is by volume, though and i was not sure if the 2% you mentioned was weight...
Any way, The set up took too long the first time, but I know what I need now, and I should be done with the tanks in an hour or two, rather than the normal four to five it was taking purging, cleaning, purging etc...
Thanks again.
David
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To those who have experience with cleaning their BBTs under pressure with acid - do you use de-aerated cold water for the rinsing and acid dilution liquid? I'm wondering about the possibility of the oxygen in the rinse water to remain in the BBT after dumping the water. Thanks for your input.
Matt Y.
Half Acre Beer Co.Matt Young
Half Acre Beer Co.
Chicago, IL
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Originally posted by The Cellarman View PostYou can never clean to much!
Then without rinsing the tank drain the acid and add your caustic at around 150*-160* 15-30min.
We run a caustic cycle every few batches and an acid passivation and sanitization after. Usually our bright is at pressure and contains some beer all the time except during cleaning. We filter our beer so our organics load is likely a lot less than some, if we didn't we would CIP more often.
Its best to purge the tank with water, then co2 and it is a lot of water, but better than a batch of bad beer. We just wash the floors with that clean purge water.
I would likely only rinse and acid sanitize in between my regular cycles if I had a problem of some sort. It's likely effective, but I would be concerned about long term organics growth or biofilm.
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Originally posted by Octobell Ray View PostTo those who have experience with cleaning their BBTs under pressure with acid - do you use de-aerated cold water for the rinsing and acid dilution liquid? I'm wondering about the possibility of the oxygen in the rinse water to remain in the BBT after dumping the water. Thanks for your input.
Matt Y.
Half Acre Beer Co.Dave Cowie
Three Forks Bakery & Brewing Company
Nevada City, CA
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