Removal of PCBs from PCB Polluted Sludge Using The Vacuum Thermal Recycling Process.

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  • Ohbayashi Hiroshi
    Environmental Research Laboratory, Z.E.R.O.-JAPAN Co., Ltd. Department of Chemical Engineering, Tokyo University of Agriculture and Technology
  • Takahashi Yasuyuki
    Environmental Research Laboratory, Z.E.R.O.-JAPAN Co., Ltd.
  • Hosomi Masaaki
    Department of Chemical Engineering, Tokyo University of Agriculture and Technology

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Other Title
  • 真空加熱分離法によるＰＣＢ含有汚泥からのＰＣＢ分離
  • シンクウ カネツ ブンリホウ ニ ヨル PCB ガンユウ オデイ カラ ノ PCB ブンリ

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Abstract

To tender PCB-polluted waste non-toxic, the attached and impregnated PCBs must be removed. For such impregnated materials, the Vacuum Thermal Recycling (VTR) method is demonstrated to be effective.<br>To demonstrate the effectiveness of this method for PCB polluted sludge, a PCB-containing water -resistant compound for duct line, was used. This sample was clayey and of high viscosity, and therefore separation of PCBs were expected to be a Herculean task.<br>After VTR the sludge sample was dry and porous. The amount of residual PCBs in the sludge sample was reduced from 3,600 mg/kg to 0.01 mg/kg or below. The elution value was reduced from 0.40 mg/l to below the detection limit of 0.0005 mg/l.

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