Wastewater treatment device

The utility model discloses a wastewater treatment device which comprises a setting tank, a grille board, a screen, a grit chamber, a sludge discharge pipe, a sludge concentration basin, a side sludge discharge device, an aeration head, an aeration hole, a filtering plate and a water collecting basin. The upper end of the setting tank is connected with a water filling opening; the grille board is arranged at the upper end of the setting tank; the screen is arranged at the lower end of the grille board; the grit chamber is formed at the bottom of the setting tank. The wastewater treatment device adopts the grille board, the screen and the filtering plate to intercept and filter wastewater to screen suspended solids with different sizes step by step, so that the wastewater is more completely filtered; the aeration hole enables an aeration processing effect to be better and improves aeration efficiency; the grit chamber and the sludge discharge pipe effectively enable impurities in the wastewater to be coagulated so as to implement a sewage separation function; by treatment of the sludge concentration basin, the impurities are discharged; purification performance is effectively improved; the device has a compact structure, has high efficiency and a high speed, is convenient to operate, is safe and reliable to operate and can effectively avoid the environmental pollution.