Biofouling auf Umkehrosmose- und Ultrafiltrationsmembranen Rolle der extrazellulaeren polymeren Substanzen (EPS) bei der Primaerbesiedlung durch Mikroorganismen. Abschlussbericht

Every water purification plant using membrane systems under non-sterile conditions carries a biofilm, which participates in the separation process as a secondary membrane. Attempts to inhibit biofouling address the forces involved in primary adhesion. In a model system, P. diminuta adhesion to a polyethersulfone membrane was investigated. Adhesion is governed by the EPS consisting of polysaccharides and proteins. Denaturation of EPS (heat, UV) inhibits the adhesion. Chaotrophic and surface active agents reduced the adhesion rate significantly indicating that hydrogen bonds and hydrophobic interactions are major adhesion forces. Changes in pH (3-10) and ionic strength interferred only weakly indicating that electrostatic interactions play a minor role in the adhesion process. (WEN)Available from TIB Hannover: F94B519 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDeutsche Forschungsgemeinschaft (DFG), Bonn (Germany)DEGerman