At least! A bactericide activated carbon !
Carbio 12 has just patenting a new ¿revolutionary¿ activated carbon which the innovative property is its strong bactericide power (patent N°INPI-06-01200).
Indeed the C1220 IG 100-BC, thanks to a specific surface treatment (it has been covered by a multitude of metallic silver patches; see the opposite picture) possess a strong bactericide power in the presence of halogenure ions.
Tested by many medical and bacteriological independent laboratories, all of them admit an amazing capacity to kill bacterium held in a liquid as soon as they are in contact with Carbio 12 activated carbon. Thus, with ordinary filtration we can clear out bacterium from polluted water and get back a drinking water.