非单一因素控制条件下短程硝化反硝化的系统稳定性研究

采用SBR工艺以水产品加工废水为研究对象,控制进水游离氨（FA）浓度为4.61 mg/L,研究高游离氨条件下短程硝化反硝化过程,对比试验结果表明：1号反应器只控制进水游离氨浓度,在运行70 d以后,转变为全程硝化,说明单一因素控制短程硝化反硝化并不稳定;2号反应器高进水游离氨条件下,控制DO为1～2 mg/L和进水pH为8.4±0.1,亚硝酸盐积累率稳定在92%以上,现已运行130 d以上,短程硝化反硝化运行稳定,表明通过非单一因素控制可实现短程硝化反硝化稳定运行.

Study on Stability of Shortcut Nitrification-Denitrification Under Not a Single Factor

Nitrogen removal by means of short-cut nitrification and denitrification was studied in a sequencing batch reactor（SBR） fed with aquatic product wastewater,with the beginning free ammonia concentration always at 4.61 mg/L.The experimental results show： No.1 reactor only controlling the beginning free ammonia（FA） concentration changed into whole-run nitrification after running 70 days,which proves that controlled by a single factor the short-cut nitrification and denitrification is unstable.No.2 reactor with high beginning free ammonia（FA） concentration controls DO as 1～2 mg/L and beginning pH as 8.4±0.1.After running 130 days,the short-cut nitrification and denitrification is continuously stable and the nitrite accumulation rate is always above 92%,which shows that the short-cut nitrification and denitrification may run stably under not a single factor.