回転円板法による潤滑油等ドラム缶洗浄排水の処理

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  • Biological treatment of drum-washed wastewater in rotating biological contactor.
  • カイテン エンバンホウ ニ ヨル ジュンカツユ トウ ドラムカン センジョウ

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Biological treatment of actual drum-washed wastewater was carried out with a pilot-scale rotating biological contactor (RBC) for a long time. The drums had been used as containers for various oils and chemicals. The disk of the RBC was 1.2 m in diameter and 2.5 m in length. The characteristics of biological treatment were evaluated. It is concluded that :<BR>(1) This wastewater consisted of various pollutants and hard-biodegradable substance, and these concentrations were very changeable ; nevertheless it was confirmed that this wastewater could be treated sufficiently and continuously by RBC. (2) It was possible to apply the method of characteristics evaluation of biological treatment in the three-phase fluidized bed system to that in the RBC. The substrate removal in biological treatment of the drum-washed wastewater was treated as a first-order reaction. (3) The characteristics value was affected by temperature. The apparent activation energy was 4.7 × 104J·mol-1. (4) The basic data for the design of a full-scale RBC were obtained.

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