磁気分離法による活性汚泥中の糸状菌とフロック形成菌の分離 The Removal of Filamentous Bacteria from the Activated Sludge Using the Magnetic Separation Methods

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The aim in this paper is to clarify that the apparatus of rotating magnetic disk separation (apparatus of RMDS) is useful to remove filamentous bacteria from the activated sludge during the waste water treatment. The bulking sludge was mixed with ferromagnetic powder (Fe3O4) to prepare magnetic sludge (SVI: 430ml·g-1 VSS) containing 2 g·l-1 MLVSS and 2 g·l-1 Fe3O4. The apparatus of RMDS composed of the aeration tank knd the magnetic separation tank equipped rotating magnetic disk with scraper was compared with that of gravitational sedimentation (apparatus of GS) composed of the aeration tank and the sedimentation tank on the separation of magnetic sludge. Six days experiments were carried out with adding 200mg·l-1 CODCr as the influent at HRT=6h using both apparatuses of RMDS and GS. In case of GS method, the SVI kept constant at around 250ml·g-1 VSS after 70h. On the other hand, the SVI with RMDS method decreased to about 200ml·g-1 VSS after 30h, and about 100ml·g-1 VSS after 90h. It was found by microscopic observation that filamentous bacteria remained in the apparatus of GS, but almost not in that of RMDS after the 6 d experiments.

収録刊行物

  • 水環境学会誌 = Journal of Japan Society on Water Environment  

    水環境学会誌 = Journal of Japan Society on Water Environment 22(4), 323-326, 1999-04 

    公益社団法人 日本水環境学会

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各種コード

  • NII論文ID(NAID)
    10004452163
  • NII書誌ID(NCID)
    AN10372439
  • 本文言語コード
    JPN
  • 資料種別
    NOT
  • ISSN
    09168958
  • NDL 記事登録ID
    4693120
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL 請求記号
    Z16-1045
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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