Effect of COD on Denitrification Process Inhibiting Sulfate Reduction
Preliminary experiment was conducted to investigate the effect of COD on the denitrification process inhibitting sulfate reduction. The experimental results showed that COD is an important ecological factor in the system, directly influencing the metabolism of NO3- and SO42-, as well as the production of S2- and NO2- .When COD was 120mg/L, there was a competition for carbon source between SRB(sulfate reducing bacterium) and DNB(denitrifying bacteria), resulting in the inhibiting of sulfate reducing. When carbon source was sufficient, S2- was increased then decreased with the increase of COD, and reaching the top value at later time at high COD. There was different accumulation of NO2- at different COD. It is found that when the concentration of NO2--N exceeded 2mg/L in the system, NO2- was the main reason of inhibitting sulfate reducing, reducing the production of S2-, and inhibiting the activity of SRB.
carbon source denitrification sulfate reducing inhibiting accumulation of NO2-
WEI Li MA Fang SUN Wei ZHU Hong WANG Bo LI Weigou
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China
国际会议
2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)
北京
英文
2007-11-13（万方平台首次上网日期，不代表论文的发表时间）