The invention discloses a composite
phosphorus removing agent and a use method thereof, wherein the composite
phosphorus removing agent is used for treating
municipal sewage with high total phosphorusconcentration, the
total phosphorus concentration is 5-10 mg / L, and the composite
phosphorus removing agent comprises the following raw materials by weight: 75-100 parts of a component A, 4.2-9.5 parts of a component B, and 3-10 parts of a component C, the component A is 15-30 parts of an aluminum salt and 60-70 parts of an iron salt, the component B is a basic flocculant and a granular flocculant, the component C is a
carbon source supplementing agent, the basic flocculant is 2-3 parts of
polyferric sulfate, and the granular flocculant is 2-3 parts of
sodium silicate and 0.2-0.5 part of
polyacrylamide. According to the present invention, the used raw materials of the phosphorus removing agent are the common
water treatment agents, and are compounded, such that the phosphorus removal rateis fast, and the phosphorus removal rate can reach more than 95%, or even 100%; the process is simple, and the production cost is low; and compared with other phosphorus removing agents, the phosphorus removing agent of the present invention has the following characteristics that the whole phosphorus removing process is more than twice as fast as the similar products while microorganisms are notadversely affected.