On site treatment : 2 phase centrifugal separation of miscellaneous sludges - since 1988 :       BP LAVERA (France) TOTAL LA MEDE (France) NAPHTACHIMIE LAVERA (France) ELF ATOCHEM (France) ESSO NOTRE DAME DE GRAVENCHON (France) SIEGL LE GRAND LEMPS (France) SHELL CHIMIE (France) TAMOIL (Switzerland)   SOLLAC (France) SHELL PETIT COURONNE (France) ICI (France) PORT PETROLIER DE FOS SUR MER (France) SHELL BERRE (France) FERRO CHEMICALS (France) SHELL CRESSIER (Switzerland) NICO (Cyprus)       On site treatment : 2 phase centrifugal separation of sludges coming from rivers, lagoons, harbours :       ENGHIEN, France (lake) MEZE, France (lagoon) Ville de PARIS, France (water treatment factory) ROERMOND, The Netherlands (river and lake) ARBON, Switzerland (harbour)