The purposes of this technology are to improve nitrogen and phosphorus removal efficiency above the level of present advanced treatment facilities, and to remove COD, trihalomethane formation potential and harmful trace organic matters, effectively.
Flow diagram
Function of each unit process
Biological Treatment
 Step-feed multistage denitrification-nitrification process
  • Biodegradable organics removal
  • Nitrogen removal
    		•
    Post-denitrification
  • Enhancement of nitrogen removal
  • Phosphorus removal
    		•
    Physicochemical Treatment
    		 High rate sand filtration
  • Decrease in the consumption of ozone
  • Reduction of the frequency of activated carbon replacement
  • Phosphorus removal
    		•
    Ozonation
  • The removal of a part of the inert and hardly biodegradable organic matters by oxidization, and the conversion of another part into biodegradable form
  • Reduction of the frequency of activated carbon replacement
    		•
    Biological activated carbon filtration
  • Organics removal by biological treatment and adsorption
    		•