Three ways to destroy PCBs from the US patent database

  1. United States Patent 6,984,767 to Hunt et al. entitled “Sonication treatment of polychlorinated biphenyl contaminated media” teaches mixing PCB contaminated media with liquid hydrocarbons, sonicating the mixture to get the PCBs into the hydrocarbons, and then destroying the PCBs with a molten sodium-containing alkali metal.

    Hunt PCBs sonication process

    Hunt PCBs sonication process

  2. United States Patent 6,537,797 to Picardal et al. teaches the use of bacteria to destroy PCBs. One of the bacterial strains that is used is SK-1 (NRRL Accession No. B30543).
  3. United States Patent 6,436,884 to William B. Spence teaches a mixture of sodium silicate surfactant (Tergitol), polyethylene glycol, and water that is capable of destroying PCBs in soils and on porous surfaces.