Preparation and application of ammonia oxidizing bacteria immobilized bioactive filler based on polyurethane carrier

The invention discloses preparation and an application of an ammonia oxidizing bacteria immobilized bioactive filler based on a polyurethane carrier, and belongs to the technical field of water treatment. The bioactive filler comprises two parts: an embedding body and the polyurethane carrier; a porous structure of the polyurethane foam carrier adsorbs a bacteria-containing embedding liquid, wherein the embedding liquid is prepared by mixing an ammonia oxidizing bacteria concentrated solution and a polyvinyl alcohol solution; a whole sheet of polyurethane foam is used as the embedding carrier, the embedding liquid is immersed to the interior of the polyurethane foam by a squeezing way, the embedding body is formed after boric acid secondary cross-linking and is combined with the polyurethane carrier to obtain a filler shape meeting requirements, and thus the ammonia oxidizing bacteria bioactive filler is obtained. The prepared ammonia oxidizing bacteria immobilized bioactive filler not only solves the problems that ammonia oxidizing bacteria are difficult in advantage establishment, easy to lose and the like, but also improves the processing ability of a reactor, shortens the start-up time, and has broad application prospects.