A method for purifying water or a water-containing material which comprises using a single or a few bacterial strains whose growth(s) is or are enabled or promoted by the addition of one or more of S-, N- and C- compounds under a low nutritional condition. A living bacterial preparation, useful for the...http://www.google.ca/patents/US4605502?utm_source=gb-gplus-sharePatent US4605502 - Methods for purifying water or water-containing material using microorganisms and living bacterial preparations as well as method for preparing and storing same
