Self-flocculation double-shell biofilm culturing carrier as well as preparation method and application thereof

The invention relates to the technical field of solid waste recycling and sewage treatment, in particular to a self-flocculation double-shell biofilm culturing carrier as well as a preparation method and application thereof. The self-flocculation double-shell biofilm culturing carrier is prepared by granulating double-shell biofilm culturing carrier powder and a hydrophilic organic solvent to form suspended particles, the double-shell biofilm culturing carrier powder comprises a kitchen waste biochar substrate, and a nanometer zero-valent iron layer is loaded on the surface of the kitchen waste biochar substrate and in a pipeline. And a phosphorus modified layer is loaded on the nano zero-valent iron layer. The biofilm culturing carrier can be prepared by the preparation method. The biofilm culturing carrier can be applied to sewage treatment. The biofilm culturing carrier is suitable for a wastewater treatment aerobic biochemical section to form flocculent precipitate, so that the water quality is clarified.