Be part of our community & join our international next generation forum now!
Having just taken delivery of a lovely new 4" filter from @SDEurope (Thanks Michael), I took apart my old aluminium drainpipe filter which has done a grand job, whilst leaking and being difficult to operate. It was a bottom fed 1.5 metre stack of carbon with a plug of copper mesh at the base that the carbon sat on. The photos are of what this mesh looked like when I got it out, and then next day after it had dried out. The white stuff was a bit jellyish, didn't taste of much but there was a lot of it. As it dried it turned to powder with a slight blueish tinge (ah! that'll be the copper). The black bit evident on the second pic are just bits of the carbon
Can anyone throw any light on what this stuff is? :-/
I probably put about 200 - 250 litres of 93% vodka through it in 3 batches, rising with pure water between batches, the vodka incidentally tasted really good and subsequently went on to make some very fine gin.
The new filter will not have the copper mesh. There was no evidence of the white stuff anywhere else in the column.
Comments
some kind of mineral from the rinsing water? :-?
StillDragon Europe - Your StillDragon® Distributor for Europe & the surrounding area
Taste it. Is the white material sweet like sugar?
StillDragon North America - Your StillDragon® Distributor for North America
Galvanic Compatibility of Aluminum and Copper @ finishing.com
Galvanic corrosion @ Wikipedia
The white stuff, my guess is aluminium oxide.
https://www.youtube.com/watch?v=ty6eY9VUIgI
@LOO :-bd
Thanks for your comments, - no taste of sugar, - the rinse water is also filtered, so I think I'm with @LOO on this one. It seems to make sense (and the articles were very interesting - think I might keep the old filter and use it as a battery!!). Can't wait to use the new (all stainless) filter, it looks better than the old drain pipe too.
Please post some pics once you have set it up.
StillDragon Europe - Your StillDragon® Distributor for Europe & the surrounding area