Nitrogen Removal in the Multi-stage Bed Attached Growth Process of $A^2/O$ System with Interanal Recycle Ratio

다단층 부착성장 공법($A^2/O$향)에서 순환비에 따른 질소제거

  • 최규철 (원광보건전문대학 환경공업과) ;
  • 윤용수 (원광보건전문대학 환경공업과) ;
  • 정일현 (단국대학교 화학공학과)
  • Published : 1997.09.01

Abstract

The process which can stabilize water quality of treatment and improve nitrogen removal rate under the condition of high organic loading was developed by charging fibrous HBC media to single sludge nitrification-denitrification process. This process was operated easier, minimized the treatment cost, and shortened the retention time. To improve T-N removal rate, a part of nitrifing liquid at aerobic zone was recycled to anoxic zone by approximate internal recycle ratio. The experimental results are as follows ; T-N removal efficiency in the organic volumetric loading 0.14-0.19 kg/COD/m$^{3}$·d was obtained asmaxium of 85% at internal recycle ratio 2.5 and in more ratio than this it was decreased. Organic removal efficiency was about 91% under the overall experimental conditions and not influenced by recycle ratio.

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