序批式膜反应器同步硝化和反硝化的特性

 为提高污水生物脱氮处理的效率和减少外加碳源,研究了序批式膜反应器(SBBR)在有氧情况下处理生活污水中同步硝化和反硝化的特性.试验表明,原水TN为80～110mg/L和溶解氧浓度为0.8～4.0mg/L情况下,出水TN小于15mg/L,NH₃^-N去除率达100%,TN去除率54%～77%,NH₃^-N容积负荷率为47～94mg/(L·d),TN容积负荷率为56～113mg/(L·d).TN的变化规律为在NH₃^-N降到零或最小之前,TN持续降低之后,TN有短时的上升后再缓慢降低.在较大的溶解氧浓度范围内,SBBR具有同步硝化和反硝化的能力,建议将NH₃^-N降解到零或最小值的时刻,作为同步硝化和反硝化的结束点.

Character of simultaneous nitrification and denitrification in a sequencing batch biofilm reactor

In order to improve the efficiency of sewage biological removal of nitrogen and to reduce the carbon source added from outside, the character of simultaneous nitrification and denitrification of sequencing batch biofilm reactor (SBBR) in treating living sewage under the condition of oxygen existing was studied. Under the situation of TN of raw water with 80~110mg/L and dissolved oxygen concentration with 0.8~4.0mg/L, the effluent TN was below 15mg/L, NH3-N removal rate reached 100%, TN removal rate was 54%~77%, NH3-N volumetric load was 47~94mg/(L?d), TN volumetric load was 56~113mg/(L?d). Before NH3-N reduced to zero or minimum, TN reduced continuously, and after this point raised for short time then reduced slowly. SBBR possessed the capacity of simultaneous nitrification and denitrification in wider range of dissolved oxygen concentration; and when NH3-N reduced to zero or minimum value, the time was suggested to be the end of simultaneous nitrification and denitrification.