UV disinfection/pasteurizing - Home Brew Forums
Home Brew Forums > Wine, Mead, Cider, Sake & Soda > Soda Making > UV disinfection/pasteurizing
Cool Brewing Giveaway - Supporting Membership Drive & Discount

Reply
 
Thread Tools
Old 06-25-2013, 02:26 PM   #1
FarFromBilly
Recipes 
 
May 2013
Posts: 30


Does anyone have any information about pasteurizing home brewed soda using a UV lamp? I currently have a medical grade narrow band UVB lamp. I am wondering first of all if I can use it to render the yeast inert as well as kill off any other "bugs" that may be in the soda. If so how long would I have them exposed to the light to render the yeast inert to increase shelf life as well as reduce the likelyhood of soda bombs, when using sugar.

Thanks to everyone in advance



 
Reply With Quote
Old 06-25-2013, 02:55 PM   #2
ColoHox
Compulsive Hand Washer
HBT_SUPPORTER.png
 
ColoHox's Avatar
Recipes 
 
Oct 2011
Fort Collins, CO
Posts: 1,871
Liked 402 Times on 286 Posts


Is your soda in brown glass bottles, or any colored glass bottles by chance? The glass will block all but a tiny portion of the UV rays, leaving not enough to pasteurize anything. What about heat pasteurization?


__________________
Bacteria are the only culture some people have.

 
Reply With Quote
Old 06-25-2013, 05:41 PM   #3
FarFromBilly
Recipes 
 
May 2013
Posts: 30

Clear plastic bottles

 
Reply With Quote
Old 06-25-2013, 06:38 PM   #4
ColoHox
Compulsive Hand Washer
HBT_SUPPORTER.png
 
ColoHox's Avatar
Recipes 
 
Oct 2011
Fort Collins, CO
Posts: 1,871
Liked 402 Times on 286 Posts


Also blocks UV. You know those little backpacking water sterilizers (Steripen I believe) have to be dunked into the water to work.
__________________
Bacteria are the only culture some people have.

 
Reply With Quote
Old 06-26-2013, 01:25 PM   #5
leonamccauley
Recipes 
 
Jun 2013
Posts: 4

Does the color of the bottle has much effect..?

 
Reply With Quote
Old 06-26-2013, 02:06 PM   #6
ColoHox
Compulsive Hand Washer
HBT_SUPPORTER.png
 
ColoHox's Avatar
Recipes 
 
Oct 2011
Fort Collins, CO
Posts: 1,871
Liked 402 Times on 286 Posts


A brown glass/plastic bottle will block more UV than clear. Some UV does get through, hence "skunked" beer in green bottles. Although nothing even close to the intensity required for pasteurization.
__________________
Bacteria are the only culture some people have.

 
Reply With Quote
Old 06-28-2013, 04:29 AM   #7
Kayvon
Recipes 
 
May 2013
Posts: 16


Quote:
Originally Posted by ColoHox View Post
Also blocks UV. You know those little backpacking water sterilizers (Steripen I believe) have to be dunked into the water to work.
No, UV will largely penetrate the clear plastic bottles. It's simply more effective to introduce the UV directly to the water in Steripen's case.

See http://en.wikipedia.org/wiki/Solar_water_disinfection for an example.

However, I don't know how well this will work on your yeast. If you had a microscope handy, you could test it.

 
Reply With Quote
Old 06-28-2013, 07:38 PM   #8
ColoHox
Compulsive Hand Washer
HBT_SUPPORTER.png
 
ColoHox's Avatar
Recipes 
 
Oct 2011
Fort Collins, CO
Posts: 1,871
Liked 402 Times on 286 Posts


We weren't discussing whether UV could penetrate, but if it can be used to pasteurize. It can penetrate, and has the effects I've already mentioned, in addition to the generation of reactive oxygen.

According to your source, clear water (which has a lower optical density than beer/soda and higher UV penetration) must be kept in full sunlight for 6 hours - 2 days, and just to kill diarrhea causing microbes. No one should do that to their beer/soda, and yeast is pretty tough.

I would still say though, that the OP's UVB lamp probably isn't going to cut it.
__________________
Bacteria are the only culture some people have.

 
Reply With Quote
Old 06-28-2013, 07:47 PM   #9
FarFromBilly
Recipes 
 
May 2013
Posts: 30

According to a response email I got from a uv disinfection system manufacturer, for water and waste treatment facilities, it isn't going to work for one reason. The root beer is not light transmissive enough. He stated that the fluid being treated will require the solution to transmit 75% of the uv to be effective. He also stated that soda/cola/root beer is going to only transmit about 25% of the uv. So to make a short story long, it's not going to work with the root beer I make.



 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pasteurizing a whole keg (3 gal)? wh4tig0t Cider Forum 2 12-01-2012 02:07 AM
Pasteurizing Fuddham Cider Forum 2 11-03-2012 09:45 PM
Pasteurizing tandersen123 Beginners Beer Brewing Forum 5 04-04-2012 01:15 PM
Steam Disinfection Erbium:YAG Equipment/Sanitation 6 09-05-2006 02:18 AM


Forum Jump