JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2011, Vol. 35 ›› Issue (05): 87-90.doi: 10.3969/j.jssn.1000-2006.2011.05.019

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Study on treatment of slightly polluted raw water with biological aerated filter filled with attapulgite

LIN Zizeng1,*   

  1. 1.College of Civil Engineering,Nanjing Forestry University, Nanjing 210037, China;2.Nanjing Municipal Design and Research Institute Co., Ltd., Nanjing 210008, China
  • Online:2011-09-30 Published:2011-09-30

Abstract: The micropolluted raw water was treated by bidoyical oerated filter(BAF) using media with representative fractal characteristics in order to investigate the attapulgite media startup performance and the treatment effect of filter. During filter startup phase,the biofilm culturing process finished in about 20 days under the condition that hydraulic loading was controlled at 17 m3/(m2〖DK〗·h), hydraulic retention time 90 min, gaswater ratio 1〖DK〗∶1—12〖DK〗∶1 and water tempertature 216—327 ℃The results showed that the rough surface of attapulgite media whose fractal dimension was 314 and it improved the microbial biofilm growth. During filter operation phase, the removal rate of CODMn, NH3N, turbidity could reach 1466 %, 8581 % and 5300 %respectively, which proved a satisfied degradation effect.

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