Resin-based composite porous biological carrier filler for biofilm process

A resin-based composite porous biological carrier filler for a biofilm process relates to a biological sewage treatment technology and is characterized in that a carrier is spherical and can be detachably divided into an upper hemisphere and a lower hemisphere, the upper hemisphere and the lower hemisphere are connected in a matched manner, holes are uniformly formed in the surface of the carrier, hole walls are arranged on the peripheries of the holes, and the hole walls extend from the outer side to the inner side of the carrier; the tail ends of the pore walls of the pore wall channels are gradually reduced from outside to inside to form spherical cavities in a surrounding mode, the spherical cavities are formed in the center of the carrier, the porous foam filler is arranged in the spherical cavities, the content of dissolved oxygen in the biological carrier filler is low, an anoxic environment can be formed, and growth of denitrifying bacteria is effectively promoted; and synchronous nitrification and de