Efficient denitrification, dephosphorization, denitrification and phosphorus resource recycling process for urban sewage

Efficient denitrification, dephosphorization, denitrification and phosphorus resource recycling process for urban sewage

  • CN 102,092,898 A
  • Filed: 12/24/2010
  • Published: 06/15/2011
  • Est. Priority Date: 12/24/2010
  • Status: Active Application
First Claim
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1. town sewage denitrification dephosphorization denitrification and phosphor resource high efficiente callback technology is characterized in that, may further comprise the steps:

  • (1) sewage enters anaerobic pond (2), and under the anaerobic state, mud is stored carbon source in vivo with the form of poly-beta-hydroxy-butyrate, discharges phosphorus simultaneously;

    (2) sewage enters first settling tank (3) and carries out mud-water separation, mud surmounts nitrification tank (5) and enters anoxic pond (7), a supernatant liquor part enters induced crystallization reactor (4), enter nitrification tank (5) again after finishing dephosphorization, another part supernatant liquor directly enters nitrification tank (5), and nitrification tank (5) changes into nitrate with the ammonia nitrogen in the supernatant liquor;

    (3) sewage in the nitrification tank (5) enters second settling tank (6) and carries out mud-water separation, and supernatant liquor enters anoxic pond (7), finishes and inhales phosphorus and denitrification, and sludge part is back to nitrification tank (5), and excess sludge is discharged;

    (4) sewage enters aeration tank (12) by anoxic pond (7), and after being entered final deposition pool (8) and carried out mud-water separation by aeration tank (12) then, supernatant liquor is discharged, and sludge part is back to anaerobic pond (2), and excess sludge is discharged.

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