Straw pulp papermaking wastewater treatment system

The utility model relates to a straw pulp papermaking wastewater treatment system, which comprises a water inlet pipeline, a grating, a regulating reservoir, a grit chamber, an anaerobic hydrolysis tank, a hydrolysis precipitation tank, an aeration tank, a secondary sedimentation tank, a coagulating basin, an air floatation tank, a water outlet pipeline, a sludge concentrated tank, an anaerobic sludge digester, a belt filter press and a sludge transport pipeline, wherein the water inlet pipeline, the grid, the regulating reservoir, the grit chamber, the anaerobic hydrolysis tank, the hydrolysis precipitation tank, the aeration tank, the secondary sedimentation tank, the coagulating basin, the air floatation tank and the water outlet pipeline are sequentially communicated with one another; the regulating reservoir, the hydrolysis precipitation tank, the secondary sedimentation tank, the coagulating basin and the anaerobic sludge digester are all communicated with the sludge concentrated tank; and the belt filter press is communicated with the anaerobic sludge digester and the sludge transport pipeline. The papermaking wastewater treated by the straw pulp papermaking wastewater treatment system is relatively good in biodegradability, and good in water quality, reaches the discharge standard; the problem of wastewater treatment in current papermaking industry is solved; the blank spot in an existing papermaking wastewater treatment technology is compensated; and the papermaking wastewater treatment system is suitable for widespread promotion and application.