Long, soft suspension or floats some industrial wastewater often contain fibrous, these pollutants or because size is too small, or because of an elongated soft texture can sink grid gap. If these can not effectively remove suspended solids, may be wound around the impeller pumps or aerators, affecting the efficiency of the pump or the Aerator. For some special industrial waste containing such flotsam available sieve bag house method is to go through the sewage interception large grille with mesh filter after debris, or directly through the mesh filter. Mesh aperture typically less than 4 mm, typically 0. 15 ~ 1. 0 mm. Because of small perforations, when used in urban sewage treatment, its effect is equivalent to the removal of BOD5 primary clarifies.
