METHOD FOR EFFICIENTLY TREATING NITROGEN-CONTAINING WASTEWATER BASED ON DNRA-ANAMMOX IMMOBILIZED PELLETS

The present invention relates to a method for efficiently treating nitrogen-containing wastewater based on DNRA-Anammox immobilized pellets. The DNRA-Anammox immobilized pellets are formed by embedding DNRA bacteria and Anammox bacteria with a cross-linked polymerization product of polyvinyl alcohol, sodium alginate, and gelatinized starch as a carrier. The immobilized pellets used in the method of the present invention have the advantages of high biomass concentration, strong environmental toxicity resistance, recycling, and the like, and high bacterial concentration and bio-activity of the DNRA bacteria and Anammox bacteria in a system can be maintained, so that the total nitrogen removal rate of the system is increased. Both the DNRA bacteria and the Anammox bacteria are anaerobic bacteria, the DNRA-Anammox immobilized pellets block mass transfer of dissolved oxygen, so that the DNRA bacteria and Anammox bacteria in the DNRA-Anammox immobilized pellets are not easily affected by the dissolved oxygen, the s