Preparation method and application of netted carrier-based sulfur-oxidizing bacteria immobilized fixed bioactive filler

The invention relates to a preparation method and an application of a netted carrier-based sulfur-oxidizing bacteria immobilized fixed bioactive filler, and belongs to the water treatment field. The fixed bioactive filler comprises an occlusion body and a carrier; the carrier is a netted fixed carrier prepared by adding a hydrophilic material polyvinyl alcohol to main materials comprising polyethylene and polypropylene, and carrying out hot melting or sheet hot pressing; the netted structure of the carrier allows the occlusion body to penetrate through meshes and the carrier to form a riveting structure in order to increase the integral stability; an occlusion liquid is obtained by mixing a sulfur-oxidizing bacterium concentrate with a polyvinyl alcohol solution; and the occlusion liquid is uniformly coated on the netted carrier, and is subjected to two stage crosslinking by boric acid to form the occlusion body, and the occlusion body is combined with the netted carrier to obtain the sulfur-oxidizing bacteri