SBR反应器中有机物去除与硝化反硝化过程INT-ETS活性变化

INT-ETS Activity Change of Activated Sludge During Nitrification,Denirification and Organism Removal in SBR Process

通过检测不同进水氨氮浓度和有机物浓度下的SBR工艺系统的INT-ETS活性,研究了SBR工艺去除有机物与硝化反硝化过程中污泥生物活性的变化规律.结果表明,INT-ETS活性可以有效地表征SBR工艺系统的生化反应进程;SBR工艺一个反应周期内,有机物降解、硝化和反硝化阶段生物活性依次降低;当进水COD为300 mg/L,氨氮为40 mg/L时,系统的INT-ETS活性从232.59 mg/(g.h)下降到190.65 mg/(g.h),最终降至113.88 mg/(g.h);伴随有机物的去除和硝化反硝化的进程,INT-ETS活性一般会出现特征点,预示着不同反应阶段的开始与结束;通过不同进水氨氮浓度(14.5 mg/L和42.0 mg/L)和有机物浓度(COD为293 mg/L和685 mg/L)的试验,发现运行条件的变化并未明显改变SBR系统的INT-ETS活性变化规律,但会影响INT-ETS活性曲线上标志不同反应阶段的特征点出现时间.

Through nitrogen shock loading and organic shock loading experiments, we studied the changing rule and activity status of biological activity of activated sludge in organic matter biodegradation, nitrification and denitrification course in SBR process by the determination of INT-ETS activity. The experimental results show that INT-ETS activity could provide a good indication of the ongoing biological reactions of SBR process. Biological activity of organic matter biodegradation, nitrification and denitrification course in SBR process reduced orderly. INT-ETS activity reduced from 232.59 mg/（g·h） to 190.65 mg/（g·h） and resultly to 113.88 mg/（g·h） when the effluent concentration of COD and NH4^＋-N were 300 mg/L and 40 mg/L. Nitrogen shock loading （14.5 mg/L and 42.0 mg/L） and organic shock loading （COD are 293 mg/L and 685 mg/L） experiments cure verify that the operational conditions could not influence the changing rule of INT-ETS activity, but the time of the appearance of break points marking different reaction course in profile was influenced.