Iron-carbon fiber coupling filler and application thereof in sewage treatment

The invention discloses an iron-carbon fiber coupling filler and application thereof in sewage treatment. The iron-carbon fiber coupling filler is composed of a filler shell, a surface filler and an inner core; the filler shell is a hollow column body which is matched and fixed through a buckle roller; the surface layer filler is attached to the inner surface of the column body to form a cavity, and the cavity is filled with the iron-carbon compound to form an inner core; the surface layer filler is a carbon fiber material; and the iron-carbon compound is prepared by stirring and mixing agar powder, an emulsifier, starch and iron powder with boiling water and then solidifying. The iron-carbon fiber coupling filler for enhancing nitrogen removal is prepared, the nitrification nitrogen removal effect is effectively enhanced, the inhibition effect of a solid carbon source on autotrophic microorganisms is relieved, attachment and fixation of the microorganisms are accelerated and enhanced, implementation operatio