UV for dechlorination?

[lhall]

Hi probrewers,

In doing some research on dechlorination, I came across a lot of references for using UV light to dechlorinate water. Has anyone used this, is it cost effective for smaller breweries?

[Fred Scheer]

Linus:
I can bring some articles in that field for you to do
some resaerch. Call or email me................
Hope to see you at tomorrows MBAA District Mid South meeting

Fred

[Rob Creighton]

Why is it that the emotional, suspicious side of me thinks that using ultra violet radiation to blast chlorine and chloramines in water creates some evil substitute chemical as part of the reaction? Probably not and luckily, I'm no chemist. I guess my question would be on the cost. Is it cost effective? Let us know what you find out. Thanks.

[beertje46]

Why is it that the emotional, suspicious side of me thinks that using ultra violet radiation to blast chlorine and chloramines in water creates some evil substitute chemical as part of the reaction? Probably not and luckily, I'm no chemist. I guess my question would be on the cost. Is it cost effective? Let us know what you find out. Thanks.

And what does the UV do for Pharmaceutical Tainted (http://www.msnbc.msn.com/id/23504373/) drinking water?

[JoeV]

I have no experience dechlorinating with UV. I have used UV bulbs as a sterilization step in water treatment systems and can relay my thoughts on them. I can tell you this, they need to be replaced every year (at least for sterilizing applications) as they gradually loose effectiveness even though they are not burned out. UV has lower flow rates than carbon because there needs to be "residence time" for the bulb to do it's thing. It also consumes electricity. The bulbs are expensive also. Although your specific water may warrent exotic treatment systems my guess is carbon would do a fine job. Its tried and true.

Cheers,
Joe

[dick murton]

I've not heard of UV for dechlorination. I have heard of it for O3 removal only, but.....

I have only ever head of carbon for Cl removal (as Cl), perhaps ClO2 is different. But then of course, you need to keep the chlorine free water bug free, so we are back to ClO2 O3 or possibly low levels of Cl again, or UV / sterile filtration

Fred - I would be interested to see these articles if you could drop them my way please

CHeers