Aeration and Heating Improve Slow Sand Filtration as a Disinfection System for Closed Hydroponic Systems

この論文にアクセスする

この論文をさがす

著者

抄録

Aeration and heating were used to improve the disinfection activity of slow sand filtration of recirculating nutrient solutions in a closed hydroponic system. Filter performance was evaluated under different running conditions using <i>E. coli</i> elimination efficiency as an indicator of filter performance. Aeration with or without heating during filter 'ripening' increased filter performance so much as to obviate differences in performance associated with filtration rate. The filter reduced influent <i>E. coli</i> concentrations by nearly 3 orders of magnitude with aeration. Effluent <i>E. coli</i> concentrations from filters pre-circulated with aeration and heating were over 4 orders of magnitude lower than influent concentrations. Vertical distribution of viable <i>E. coli</i> in an effective slow sand filter which reduced <i>E. coli</i> concentrations from 10<sup>6</sup> cfu ml<sup>-1</sup> to less than 10<sup>2</sup> cfu ml<sup>-1</sup> was mostly in the Schmutzdecke (10<sup>6</sup>∼10<sup>7</sup> cfu g<sup>-1</sup>) and first 10 cm of the surface of the sand layer. High-performance filters did not eliminate <i>Ralstonia solanacearum</i> as effectively as <i>E. coli</i> or the fungal pathogens <i>Fusarium oxysporum</i> and <i>Pythium helicoides</i>.

収録刊行物

  • Environment control in biology  

    Environment control in biology 45(3), 179-187, 2007-09-30 

    Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

参考文献:  15件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

被引用文献:  1件

被引用文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10021228989
  • NII書誌ID(NCID)
    AA12029220
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    1880554X
  • NDL 記事登録ID
    8965019
  • NDL 雑誌分類
    ZR1(科学技術--生物学)
  • NDL 請求記号
    Z78-A361
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ