Sulfur autotrophic denitrification active microbial carrier and application thereof

The invention belongs to the technical field of pollution treatment, and discloses a sulfur autotrophic denitrification active microbial carrier and application thereof. The microbial carrier comprises 45 parts of sulfur powder, 15 parts of calcium carbonate, 10-30 parts of poly (butylene succinate) (PBS), 25 parts of water glass, 5 parts of sodium bicarbonate and 5 parts of an autotrophic denitrifying bacterial agent, the autotrophic denitrifying bacterial agent is a mixture of two optional bacteria, the preservation number of SZG-SAD-001 is CCTCC NO: M 2022806, and the preservation number of SZG-SAD-002 is CCTCC NO: M 2022805. A high-molecular slow-release carbon source is added into the carrier, so that COD is stably released, and autotrophic denitrification and heterotrophic denitrification can be combined to synergistically remove nitrogen. Meanwhile, the national autotrophic denitrifying bacterial agent added with water can be quickly started in an anaerobic/anoxic environment, the condition that the do