A/O生物脱氮工艺的反硝化动力学试验

Denitrification dynamics for A/O biological nitrogen removal technology

通过SBR反应器间歇试验,研究了投加外碳源后系统的反硝化潜力和反硝化速率的变化.结果表明,向原有淀粉废水中投加外碳源乙醇废液后,可以明显提高系统的反硝化速率和反硝化潜力,反硝化速率由0.74mg/(g?h)增加到2.11mg/(g?h),反硝化潜力由5.6mg/L增加到16.2mg/L.脉冲投加淀粉废水进行缺氧反硝化间歇试验,可以获得系统污泥动力学信息,确定原水的反硝化潜力,并可估计城市污水处理厂的总反硝化潜力,因此可以预测获得最小出水硝酸氮浓度的控制策略.相对于COD/N,如果确定了系统反硝化潜力和污水水质能获得更多信息.

The variation of denitrification potential and denitrification rate after addition of external carbon sources through SBR reactor intermittent test was studied. The systematic denitrification rate and denitrification potential could be enhanced obviously after adding of external carbon source ethanol waste liquor in the original starch waste water, denitrification rate from 0.74 mg/（g·h） to 2.1 lmg/（g·h） and the denitrification potential from 5.6mg/L to 16.2mg/L. The intermittent test of oxygen-poor denitrification carried out for the pulse added starch waste water, the systematic sludge kinetic information could be obtained, the denitrification potential of the original water could be determined, and the total denitrification potential of urban wastewater treatment plant could be estimated; therefore, it could be forecasted to obtain the control strategy of smallest effluent nitric acid concentration. Opposed to COD/N ratio, much more information could be obtained if the denitrification potential and wastewater quality were determined.