Device and method for realizing nitrogen and phosphorus removal of urban domestic sewage by integrated PD/A coupling denitrifying phosphorus removal quick start

The invention discloses a device and a method for realizing nitrogen and phosphorus removal of urban domestic sewage through integrated PD/A coupling denitrification phosphorus removal quick start, and belongs to the field of urban sewage biological treatment. Firstly, urban domestic sewage enters an SBR reactor, denitrifying phosphorus-accumulating bacteria perform anaerobic phosphorus release reaction by using a carbon source therein, and an external carbon source is stored as an internal carbon source; secondly, pumping the nitrate wastewater into an SBR (sequencing batch reactor), reducing NO3 into NO2 by short-range denitrifying bacteria by using a carbon source, and synchronously removing NH4 < + > and NO2 in the wastewater by anaerobic ammonium oxidation bacteria; denitrifying phosphorus-accumulating bacteria utilize a part of NO3 and NO2 as electron acceptors to carry out denitrifying phosphorus uptake, and PO4 < 3-> in the sewage is removed. According to the method, quick start an