Nitrogen and phosphorus removal active biological carrier and application thereof

The invention discloses a nitrogen and phosphorus removal active biological carrier and application thereof. The nitrogen and phosphorus removal active biological carrier is obtained by molding and granulating magnetite powder, sulfur powder and siderite powder; the preparation method comprises the following steps: mixing magnetite powder, sulfur powder, siderite powder, a binder and a pore-foaming agent, adding water, uniformly stirring, and molding; or mixing magnetite powder, sulfur powder, siderite powder and a binder, then sequentially adding a foaming agent and water, uniformly stirring,and molding. According to the nitrogen and phosphorus removal material based on the combination of magnetite, sulfur and siderite, the particulate matters are used as a microbial carrier, a microbialelectron donor and a phosphorus removal material, are applied to advanced treatment of micro-polluted water, and can enhance the advanced nitrogen and phosphorus removal treatment effect of secondarytreatment effluent of a se