Patent ID: 6691783
Filing Date: 2004-02-17
Classification: B09C,C08B,C08J,C12N,C12P,C12R

Abstract:
A process for plugging a permeable stratum, comprising the steps ofa) providing into a permeable stratum, a biofilm which comprises an elastic exopolysaccharide which exopolysaccharide is the exopolysaccharide produced by a bacterium which has the characteristics that it is Gram negative, bacilliary, about 0.2Ã—0.8 &mgr;m, facultative anaerobe, grows between 15Â° and 45Â° C. with a temperature optimum of 37Â° C., grows between pH 4-1 1 but not at pH 2, grows in AB13 medium or minimal medium, is motile, lacks a capsule, and lacks spores, and b) incubating said biofilm for an amount of time sufficient to produce a plugged stratum.