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      Study of operational conditions of simultaneous nitrification and denitrification in a Carrousel oxidation ditch for domestic wastewater treatment

      , , , , , , ,
      Bioresource Technology
      Elsevier BV

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          Abstract

          The study on the operational conditions of simultaneous nitrification and denitrification (SND) in the channel of oxidation ditch (OD) without the need for a special anoxic tank was carried out based on lab-scale and pilot-scale experiments using real domestic wastewater. The influence of sludge loading and component proportion in influent, temperature, hydraulic retention time (HRT), dissolved oxygen (DO) and operational mode on SND was investigated. The result indicated that the optimal DO (ODO) of SND occurrence was confirmed majorly by the sludge loading of influent and temperature, the high TCOD/NH(3)-N and short HRT can enhance the occurrence of SND. A new operational mode was proposed that achieved a higher removal efficiency of 60-70% for total nitrogen by SND with HRT of 4-6h, and the concentrations of NH(3)-N and TN in effluent are less than 5 and 15 mg/L, respectively.

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          Author and article information

          Journal
          Bioresource Technology
          Bioresource Technology
          Elsevier BV
          09608524
          February 2010
          February 2010
          : 101
          : 3
          : 901-906
          Article
          10.1016/j.biortech.2009.09.015
          19818603
          f0de83e1-f9fa-4208-a773-fafa9dd23a7a
          © 2010

          https://www.elsevier.com/tdm/userlicense/1.0/

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