Heterotrophic nitrification-aerobic denitrification microbial agent and application thereof

The invention discloses a heterotrophic nitrification-aerobic denitrification microbial agent. The microbial agent is prepared by compounding seed solutions of pseudomonas XD9, paracoccus LJ2 and pseudomonas XN9, and the volume ratio of the seed solutions of pseudomonas XD9, paracoccus LJ2 and pseudomonas XN9 is (1.8-2.2):(0.3-0.6):(0.4-0.7). The complex microbial agent disclosed by the inventionis suitable for treating wastewater with relatively high NO3-N concentration, such as aquaculture wastewater, and has relatively high denitrification efficiency. Moreover, the composite microbial agent disclosed by the invention is relatively low in optimal denitrification C/N, and has the advantages of relatively low COD concentration and relatively low reaction cost in a reaction system whenbeing applied to wastewater treatment. 本发明公开了一种异养硝化-好氧反硝化菌剂，由假单胞菌XD9、副球菌LJ2和假单胞菌XN9的种子液复配而成，假单胞菌XD9、副球菌LJ2和假单胞菌XN9种子液的体积比为1.8～2.2∶0.3～0.6∶0.4～0.7。本发明的复合菌剂适合处理NO3--N浓度较高的废水，例如水产养殖废水，并具有较高的脱氮效率。且本发明的复合菌剂脱氮最佳C/N较低，应用于废水处理时，具有反应体系