化学物質の下水処理工程における除去効果の改善  [in Japanese] Improvement of Removal Efficiencies of Chemical Materials in Sewage Treatment Process  [in Japanese]

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Abstract

Removal characteristics and removal improvement in sewage treatment plant, and batch-type laboratory test were examined for organic chemicals such as bisphenol A (BPA), a suspected endocrine disruptor.<br>The BPA removal efficiencies were 33-72% in a sewage treatment system, and the majority was carried out in the aeration tank. In the laboratory test, gross removal efficiency was 71%, of which about 40% was due to initial adsorption to sludge (IAS). Moreover, it was found that removal rate of BPA in the solution after IAS was almost equal to its degradation rate in the sludge.<br>IAS was enhanced by increasing MLSS concentration and by reducing the BPA concentration, however, it was decreased as increasing frequency of usage in batch type activate sludge.<br>IAS was restored by the modified reaeration process (MRP) applied to the sludge. It was thought that the appropriate time of reaeration was at least ten hours. MRP was also effective in the removal of other organic chemicals tested in this study. However, it was not effective for DIO (1,4-dioxane), a substance whose octanol/water partition coefficient (Log Pow) and biodegradation ratio were low.

Journal

  • Journal of Japan Society on Water Environment

    Journal of Japan Society on Water Environment 25(2), 97-103, 2002-02-10

    Japan Society on Water Environment

References:  24

Cited by:  3

Codes

  • NII Article ID (NAID)
    10008006550
  • NII NACSIS-CAT ID (NCID)
    AN10372439
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    09168958
  • NDL Article ID
    6064335
  • NDL Source Classification
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL Call No.
    Z16-1045
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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