Biological treatment method for denitrification treatment of low-concentration nitrate nitrogen wastewater

The invention relates to a biological treatment method for denitrifying low-concentration nitrate nitrogen wastewater. According to the method, NO3 -N in the low-concentration nitrate nitrogen wastewater is removed mainly through denitrification of dominant bacteria represented by Pseudoxanthomonas sp., and the method sequentially comprises the following steps: preparing a domestication nutrient solution, filling an anaerobic bottle, culturing a biological membrane, pre-adjusting the wastewater and carrying out biological treatment on the wastewater. The method can quickly and deeply remove NO3 -N in the low-concentration nitrate nitrogen wastewater, shortens the wastewater treatment period, is low in treatment cost, does not cause secondary pollution, is simple and feasible, and is suitable for treating low-concentration nitrate nitrogen wastewater of various scales after being amplified. 一种用于反硝化处理低浓度硝酸盐氮废水的生物处理方法。本发明主要通过以假黄单胞菌属(Pseudoxanthomonas sp.)为代表的优势菌属的反硝化作用对低浓度硝酸盐氮废水中的NO3--N进行去除，步骤依次为：配制驯化营养液、装