J4 ›› 2010, Vol. 40 ›› Issue (5): 1163-1169.

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Experiment on Low C/N Ratio Domestic Wastewater Treatment by ABR &|Biocontact Oxidation Process

HUANG Ji-guo1,GAO Wen-han1,DONG Li-li1,MENG Yu-li2,ZHOU Xiu1,YANG Liu1   

  1. 1.College of Environment and Resources, Jilin University, Changchun 130026, China;
    2.China Northeast Municipal Engineering and Research Institute, Changchun 130021, China
  • Received:2010-01-15 Online:2010-09-26 Published:2010-09-26

Abstract:

In recent years, there is a trend of low C/N ratio in municipal domestic wastewater, which   results in serious problems of denitrification of wastewater. This paper presents the experimental study on ABR & Biocontact Oxidation Process to treat low C/N ratio domestic wastewater, determines the experimental operating parameters, and the result shows that in the range from 2 to 7 of the COD/N ratio of influent, when HRT=10 h, R=2.5, T=30 ℃, the removal rate of TN shows the satisfactory performance. The average denitrification rate decreases rapidly as the COD/N ratio of influent reduce, which is due to the lack of carbon source. Under the satisfactory operating conditions, when the COD/N ratio of influent is 6-7, the average denitrification rate reaches more than 80%, and the concentration of TN in effluent is lower than 15 mg/L, which meets the first A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant.

Key words: ABR, biocontact oxidation, low C/N ratio, nitrogen removal

CLC Number: 

  • P641.69
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