Method for realizing synchronous PND-DNRA treatment of wastewater containing carbon and nitrogen by immobilized beads

The invention relates to a method for realizing synchronous PND-DNRA treatment of wastewater containing carbon and nitrogen by immobilized beads. The method is carried out based on immobilized beads,and the immobilized beads are formed by embedding partial nitrifying bacteria, denitrifying bacteria and DNRA bacteria with a crosslinking polymerization product of polyvinyl alcohol, sodium alginateand gelatinized starch as a carrier. The method successfully realizes partial nitrification, denitrification and dissimilatory nitrate reduction, and the three reaction processes are carried out to achieve combined nitrogen and carbon removal, so the synchronous removal of ammonia nitrogen, nitrate nitrogen and COD is successfully realized in one reaction system, and the nitrogen removal efficiency of the system is improved; and the immobilized beads are helpful for keeping high biomass concentration and high bioactivity in the system in order to enhance the running stability of the system. 本发明涉及一种基于固定化小球实现同步PND-DNRA处理