The invention discloses a
sewage treatment device with a multi-stage filtering function, and relates to the technical field of
sewage treatment. The
sewage treatment device comprises a filtering cabin, a regulating cabin, a
sedimentation cabin, a dosing tank, a detection mechanism and a conveying mechanism. The filtering cabin, the regulating cabin and the
sedimentation cabin are arranged in sequence along the conveying direction of the
water flow. The dosing tank is tightly connected to the outer wall of the filtering cabin, the dosing tank is communicated with the conveying mechanism, the conveying mechanism is tightly connected to the filtering cabin, the conveying mechanism is used to transport sewage, the detection mechanism is communicated with the conveying mechanism, and the detection mechanism is used to detect the
metal ion content in the sewage. The sewage to be treated is first filtered through the filtering cabin to remove
solid impurities in the sewage, and then the conveying mechanism conveys the treated sewage to the regulating cabin for chemical
precipitation treatment, so that the
metal ions in the sewage are converted into insoluble precipitates, and the treated sewage finally flows into the
sedimentation cabin for natural sedimentation, thereby removing the
metal ions in the sewage.