Solid carbon source supplementary method in sewage treatment system

The invention provides a solid carbon source supplementary method in a sewage treatment system. According to the solid carbon source supplementary method, a solid carbon source is packaged with a thin walled tube; one end of the thin walled tube is sealed, the other end is provided with an opening, and micropores are distributed on the wall of the thin walled tube; the thin walled tube is delivered into the sewage treatment system; when the solid carbon source in the thin walled tube is used up, a novel solid carbon source can be delivered into the thin walled tube from the end provided with the opening, and then the thin walled tube is delivered into the sewage treatment system again. The solid carbon source supplementary method is capable of solving problems, that carbon source shortage is caused, and organic carbon source adding method is complex, in low carbon nitrogen ratio sewage treatment, and increasing nitrogen removal efficiency of sewage treatment; operation is simple and convenient; organic carbon