段落流をエアーレータとした酸化溝方式の窒素・リン同時除去

DOI

書誌事項

タイトル別名
  • Study on Denitrification and Dephosphorization in an Oxidation Ditch Applying Falling Water as the Aerator

抄録

In an oxidation ditch, an aerator applying falling water is effective. Higher than 90% of the BOD removal ratio and 80% of the nitrogen removal ratio are achieved constantly using intermittent aeration. 60-70% of the phosphorous removal ratio is also obtained.<BR>In this paper, dephosphorization using intermittent aeration and adding a coagulant in an oxidation ditch employing falling water as the aerator was studied. Intermittent aeration when the mixed liquid temperature was low for the purpose of removing nitrogen was also investigated.<BR>As a result, it was found that higher than 90% of the phosphorous removal ratio was obtained using intermittent aeration and adding an iron chloride (FeCl3) solution as the coagulant. The optimum quantity of the addition was that the ratio of Fe (mol) in the coagulant to P (mol) in untreated water was equal with one. When the mixed liquid temperature was low, the optimum operation for removing nitrogen was carried out under intermittent aeration by 1 hr of aeration and 2 hr of as non-aeration one cycle. This operation was also effective in dephosphorization.

収録刊行物

キーワード

詳細情報 詳細情報について

  • CRID
    1390282679518660096
  • NII論文ID
    130004118624
  • DOI
    10.11408/jsidre1965.1992.159_45
  • ISSN
    18847234
    03872335
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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