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Journal Cover   Frontiers in Environmental Engineering
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  This is an Open Access Journal Open Access journal
   ISSN (Print) 2326-5779 - ISSN (Online) 2326-5787
   Published by Science and Engineering Publishing Company Homepage  [49 journals]
  • Landfill Leachate Treatment by Aerated Recirculation and Pressurized
           Suspended Fiber Biofiltration

    • Abstract: Landfill Leachate Treatment by Aerated Recirculation and Pressurized Suspended Fiber Biofiltration
      Pages 7-18
      Author Boya WangPeter GraselGary MillingtonJohn HallasHafiz AhmadGang Che
      Recirculating leachate appears to be one of the least expensive methods for partial treatment and disposal of leachate at properly designed and operated landfill sites. The leachate recirculation not only improves the leachate quality, but also shortens the time duration required for landfill stabilization. In addition, aerated leachate recirculation may bring air into the landfill, leading to aerobic degradation of organic compounds and precipitation of heavy metals. Although aerated leachate recirculation has these advantages, leachate is only partially treated. The leachate must be further treated in order to meet the discharge requirements. In this research, aerated recirculation and pressurized suspended fiber biofiltration were tested for the treatment of leachate from landfills in Northwest Florida. The pressurized suspended fiber biofilter was configured to allow biological contact oxidation, a novel and efficient treatment process for enhanced organic and iron removal. Using the combined aerated leachate recirculation and pressurized fiber biofiltration, chemical oxygen demand (COD) of the landfill leachate can be reduced to as low as 8 mg/L and iron content can be reduced to as low as 0.02 mg/L under appropriate dissolved oxygen and alkalinity conditions.
      PubDate: 2015-08
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