Hi Reid, Have you considered making the candle wall thicker at the bottom so the increased head pressure will not push the water through as fast?
Trem ----- Original Message ----- From: "Reid Harvey" <[email protected]> To: "silver list" <[email protected]> Sent: Tuesday, October 07, 2003 5:24 PM Subject: [silver_list] CS>measuring ppm of a 2nd variety of concentrated CS > Dan, Marshall, > As to our determination of getting enough CS for filter saturation, with > our CS, there was never a lot of testing. We were simply following the > generator designer's instructions and corroborating on the basis of > bacteria that did and did not get through the purifiers that did and did > not contain CS. When making the CS I would simply go by the > instructions for time and color with some verification in the strength > of TE at various levels of dilution. Then again most of the ceramic > filter saturation was done with Microdyn, and this I used in direct > comparison with amounts of our own CS. Only now am I seeing that our > own could become very viable, since the automated switching takes away > the operator intensiveness. > > I believe that for those few of us who are doing silver ceramic filters > on a humanitarian basis there is still a lot to learn as far as just > what amount of CS to use, ppm and volume, and how this works with other > variables. And some are just now beginning to use silver metal. BTW, > Marshall, those ceramists 'in the loop' tend to agree that the oxide is > a good disinfectant, but only about 10% as effective as the metal. The > amounts of silver necessary may be substantially less than is used, but > once we come within the range of affordability to the poor, maybe > US$0.10 (10 cents) per filter, we don't experiment in achieving lesser > cost. > > Recently I'm finding that other varaibles have a serious impact on the > effectiveness of the silver at pathogen removal. For example, in > experimental systems that are given additional water column height, so > as to greatly increase flow (which also helps indicateover a short > period just what the life expectancy should be), we're finding that > pathogen removal isn't as good as it is at the lower column height. > Small percentages of e coli, for example, do get through. These can > become dynamic at the greater water pressure, squeezing through smaller > openings. And insufficient silver allows less contact with the > bacteria. We're currently working to verify that increasing the amount > of silver for those purifiers at greater column height will restore the > high degree of effectiveness we've come to expect. But column height, > amount of silver, and filter wall thickness are only a few of the many > variables. > > We have lots of variables in the ceramic production alone, and a big > part of my job is to alter filter composition so as to give appropriate > flow, but imagine we must fine tune the kiln temperature. Recently my > local, ceramist counterpart overfired about 100 purifiers, and this > simple act gave them double the anticipated flow rate. You better > believe that I'm praying that doubling, or trebling the silver content > will get these back to the virtual 100% effectiveness! > Bye for now. > Reid > > > Dan Nave said: > How did you make the determination of what was "enough" in terms of ppm > for the CS > to use in the water filters? > > Dan > > > > -- > The silver-list is a moderated forum for discussion of colloidal silver. > > Instructions for unsubscribing may be found at: http://silverlist.org > > To post, address your message to: [email protected] > > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > > List maintainer: Mike Devour <[email protected]> >
