Blacklight for U.V.?

[Descender]

Guessing it won't work, but if I sit a carboy in front of a blacklight, will it kill the yeast?

 

[LeBreton]

No, not even commercial UV pasteurizers kill yeast.

 

[Descender]

http://www.livestrong.com/article/252729-the-effects-of-uv-light-on-yeast/#page=1

It does and it doesn't

 

[LeBreton]

Can UV light kill yeast with enough exposure? Yes.

Does it have a practical application in cidermaking? No.

Heat and mechanical separation (filtration and/or crashing & racking) are way more effective.