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Messages - mabrungard

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31
Equipment and Software / Re: Reusing vinyl tubing
« on: February 26, 2019, 02:05:57 PM »
Let me tell you the other reason I’m not keen on bringing new vinyl tubing into my brewery. Vinyl does contain volatile compounds that take a while to leach from the tubing. I try to help that process by pre-boiling new tubing to help get the compounds out. Keeping ‘well-seasoned’ and relatively volatile-free tubing in my system makes sense to me.

32
General Homebrew Discussion / Re: Iodophor age
« on: February 26, 2019, 02:00:40 AM »
The main reason we stress the air drying aspect for using the BTF Iodophor solution is that those instructions are stated specifically on our label.  With EPA regulated products, instructions, methods, and applications are strictly adhered to, especially for commercial use.


Air Dry?? I had to go into the brewery and take my bottle off the shelf and read the instructions, but it does say that. The REALLY troubling thing is: "Why did EPA require this?" or  "Why did National Chemicals agree to this requirement?"

I'm afraid that you've just opened a can of worms, but I'm still not about to begin air drying a piece of equipment and have it pick up mold spores. As far as I'm concerned, air drying would bring iodophor back to being no better than an acid-based sanitizer...ineffective against mold spores.

33
Ingredients / Re: Gratzer Water
« on: February 25, 2019, 04:43:28 PM »
That sodium level is only going to provide a “nuance” at best. No need to worry about adding it. However, I’m curious what salt you’re adding to provide the sodium?  Sodium chloride won’t affect pH, but sodium bicarbonate will.

34
Equipment and Software / Re: Reusing vinyl tubing
« on: February 23, 2019, 08:05:55 PM »
I've managed to use my beverage lines for quite a long time too. However, I do use some extreme cleaning procedures to keep them contamination-free. A nice warm lye solution soak does an amazing job at ridding any sort of deposits in the tubing. Do recognize that using a lye solution is SUPER dangerous and requires protective equipment and care.

35
Equipment and Software / Re: Reusing vinyl tubing
« on: February 23, 2019, 07:53:11 PM »
Yeah, I'd say I've got about 10 years on my current vinyl tubing. Good sanitation practices will keep that product usable for quite a long time.

36
All Grain Brewing / Re: American Wheat Water Profile
« on: February 22, 2019, 02:06:23 AM »
Wheat is acidic? Not in my experience.

That profile should be sort of OK, but I would target a lower sulfate content unless that beer is intended to be a hoppy one.

37
Ingredients / Re: making invert sugar
« on: February 21, 2019, 02:31:49 AM »
Rob,

I know that citric acid is often recommended for making invert sugar. Its nice since its a solid and its flavor should be fine in the syrup. So the Lactic acid works equally well?

38
Ingredients / Re: making invert sugar
« on: February 20, 2019, 03:36:27 PM »
Is this oven method also used to create darker syrups?

39
The Pub / Re: your favorite commercial Pilsner
« on: February 20, 2019, 12:43:58 PM »
While its not my favorite Pils of all time, Northcoast Scrimshaw has been tasting pretty nice lately. They've apparently made improvements in their recipe or production methods.

40
General Homebrew Discussion / Re: Iodophor age
« on: February 20, 2019, 12:37:50 PM »

Other things that will degrade the solution:

-Residual alkaline detergents.  The Iodine complex and the Iodophor concentrate are acidic solutions.  Mixing into any water that has residual alkaline detergent will neutralize the solution.  I've run into people that have had issues running Iodophor through plate/counterflow chillers where there was residual alkaline detergent remaining in the system and it neutralizes the Iodophor solution.


Interesting. So if alkaline cleaners tend to neutralize iodophor solutions, it therefore suggests that highly alkaline water supplies might take a bit more of the concentrate than low alkalinity water such as rainwater, RO, or distilled? This also suggests that we can neutralize excess alkalinity in our water supply in order to make our iodophor solutions more effective.

If that's the case, the Water Acidification calculator in Bru'n Water does make it easier to figure out what a brewer's acid dose needs to be in order to neutralize most or all the water supply's alkalinity.

41
Do read the Water Knowledge page of the Bru'n Water website and you'll see the discussion of the incredibly low threshold for chlorophenol creation and perception. Virtually 100% removal is needed prior to brewing usage.

42
The enhanced carbon products do help with chloramine removal, but the throughput isn’t enhanced that much.

43
General Homebrew Discussion / Re: Chlorine/Chloramine in rinse water?
« on: February 18, 2019, 06:38:41 PM »
Sounds like they super-chlorinated the well. Maybe they had a hit on bacterial infection?  In any case, the probably just has chlorine in it and that is more likely since you are smelling it now. Chlorine is much more volatile than chloramines.

Chlorine will evaporate from dry surfaces.

44
The other thing that a Total Chlorine test kit can tell you, is if your flow rate is too high and full removal is not achieved (aka: chlorine breakthrough). 

Remember that a garden hose can easily deliver about 5 gpm. A sink faucet could also come close to that. In either case, the flowrate far exceeds the 1 gpm rate that a standard 10 inch filter can treat for chlorine compounds. Putting a restrictor with a 1/16-inch diameter hole on the line will bring the flowrate down around the 1 gpm rate.

45
Rob, I hoping that you're monitoring the residual total chlorine in your filtered water in order to help you assess when the carbon cartridge is exhausted. That's the way we do it for our industrial clients. It's so important that there are automated monitoring equipment that constantly test that the filtered water chlorine compound concentrations are below limit. Of course that's unreasonable for a homeowner, but you can perform occassional tests with a simple swimming pool test kit to confirm if and when there is chlorine breakthrough.

I use those EP-10 carbon filters in my RO system also and they are good. They are carbon block style and they do last. The treatment mechanism between activated carbon and chlorine compounds does 'consume' the carbon material. Eventually, the carbon will be used up and it must be replaced. The Pentek site does state that this filter will remove the FREE chlorine in up to 6000 gallons of water at 1 gpm. Be aware that FREE means chlorine or hypochlorite. It specifically excludes the BOUND chlorine species such as chloramines. If your water supply has chloramines, then the 1 gpm criteria goes out the door. Then to get the desired chloramine removal, the flow rate has to be reduced to under 0.1 gpm. But the amount of water that the filter can treat should still remain consistent (6000 gal).

Understand that filter and system providers are going to provide conservative estimates of capacity and performance in this case since it means that they are going to sell more filter replacements. If you're interested in maximizing your dollars, you'll be testing and monitoring the performance of your system to assess when you really need to perform those replacements.

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