La durée de vue des filtres céramiques est très élevée, ça se nettoie avec un coup de brosse ou de Scotch brite, mais s 'il y a en plus à l' intérieur un filtre de charbon actif, sa durée de vie est de six mois.
http://katadynch.vs31.snowflakehosting.ch/fileadmin/user_upload/katadyn_products/Downloads/Comparison_Katadyn_Ceramic_Filter_Elements.pdfDoulton conseille un an.
http://www.aqua-techniques.biz/Files/19102/1241122454087.pdfhttp://www.aqua-techniques.biz/PBSCCatalog.asp?CatID=117755 Les Doulton n'ont qu 'un filtre céramique de 0,5 µ, au lieu de 0,2 µ
Chez
Berkey il y a les deux types de cartouches, sans ou avec charbon actif :
La Super Sterasyl contient du charbon actif, mais ils n'indiquent pas au bout de combien de temps la remplacer.
Ici ils disent que ça a la même durée de vie ??
http://www.911water.com/Compare-Black-Berkey-and-Super-Sterasyl-Filter-s/69.htm Ca me semble curieux, car le charbon actif doit bien avoir les mêmes limites d’absorption que chez Katadyn ou Doulton.
Vu ce que le charbon actif enlève comme saloperies qui passent à travers la céramique ça me semble incontournable en période de chaos, d'avoir ce type de filtre, et d'avoir confiance dans l'efficacité du charbon actif.
The Super Sterasyl™ Water Filtration Element
The Sterasyl™ ceramic is the ceramic shell used for the Super Sterasyl™ filter element. Accordingly, this filter element will have, at a minimum, the filtration benefits of the Sterasyl™ ceramic.
Additionally, the bore of the ceramic shell is filled with granular activated carbon, which enables the filter to reduce chlorine and organic chemicals while improving the color, taste, and odor of the source water. The re-cleanable Super Sterasyl™ filter elements remove suspended solids, parasites, cysts and pathogenic bacteria (>99.99%) and reduce organic chemicals, pesticides, herbicides, organic solvents, trihalomethanes, SOCs, VOCs and foul tastes and odors. The top of the Super Sterasyl™ element is closed with a unique ceramic dome. This prevents the possibility of breeching (leakage), which can occur with filtration elements that are closed with a plastic cap.
What’s Hiding in Your Drinking Water? Super Sterasyl™ Filters:
Remove Pathogenic Bacteria:
Cholera, Typhoid, Salmonella, Serratia, E.Coli, Fecal Coliform > 99.99% removal.
Remove Cysts (>99.999%):
Cryptosporidium Parvum and Giardia Lamblia - 100% removal (based on tests by Arizona State University).
Reduce Organic Chemicals:
Pesticides, herbicides, organic solvents, SOCs, VOCs, trihalomethanes.
Reduce Chlorine > 90%
Reduce Turbidity, Sediment and Particulate:
@ 0.9 micron > 99.99%
@ 0.5 – 0.8 micron > 99.9%
@ 0.2 – 0.3 micron > 98%
(based on tests by Spectrum Laboratories, Minneapolis, MN).
Maximum working pressure: 125 psi
Maximum working temperature: 100º F
Minimum working temperature: 40º F
Super Sterasyl™ ceramic filters are manufactured to the following international standards and have been tested and approved by the following independent bodies or agencies:
ISO-9000: 2000, Hyder Labs – UK, Spectrum Labs – UK, WRc – Mednenham UK, Clare Microbiology – UK, Loughborough University - UK, University of Arizona – USA, Thresh, Beale, and Suckling – UK, and WRc Gwent – UK.
Bacterial mitosis and “grow-through”
Mitosis is the name for the usual method of bacterial cell division. This division is characterized by resolving the chromatin of the cell nucleus into a threadlike form that condenses into chromosomes, each of which separates longitudinally into two parts, one part of each chromosome being retained in each of the two new daughter cells. When conditions of growth (cell division) are right (proper environmental conditions, temperature, pressure, etc.) and sufficient nutrients, the “threadlike forms” can penetrate ordinary ceramic structure and create bacterial cells on the inside of ceramic elements. The Sterasyl™ grade filter elements incorporate silver into the porous ceramic shell, which inhibits mitosis or “grow-through”.
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