包埋固定硝化菌的亚硝化特性研究和系统调控

在使用包埋固定化硝化菌的流化床反应器中改变系统的运行参数,用模拟高浓度NH3-N废水实现从常规硝化为主到亚硝酸型硝化为主的转变。驯化完成、恢复溶解氧到3~4 mg/L后,仍然能达到高度的亚硝酸型硝化。通过间歇式实验得出亚硝酸盐的积累率随反应时间的变化规律,以此为参考调控连续进出水情况下的水力停留时间(HRT),从而达到和保持最好的亚硝酸型硝化效果。

Study on nitrification characteristics and systematic regulation of embedded immobilized nitrobacteria

In the fluidized bed reactor with embedded immobilized nitrobacteria,the normal nitrification state in artificial high ammonia wastewater can be transformed into nitrous nitrification through adjusting operational parameters.After the acclimation process,the high degree of nitrous nitrification can still be achieved when the DO is recovered to 3-4 mg/L.Sequencing batch experiment is conducted to study the relations between accumulation of nitrite and reaction time,which can be taken for reference for adjusting hydraulic retention time(HRT) in continuous-flow experiment so as to achieve and maintain the best nitrous nitrification efficiency.