COMPLEXED HEAVY METAL WASTEWATER TREATMENT PROCESS

A complexed heavy metal wastewater treatment process, comprising the following steps: S1, discharging complexed heavy metal wastewater into a sedimentation tank for preliminary precipitation to precipitate out impurities and wastes in the wastewater, and then discharging the wastewater into a reaction tank; and S2, uniformly adding a heavy metal reduction and replacement reagent into the reaction tank, so that a heavy metal in the wastewater is replaced out. According to the present invention, the wastewater is preliminarily precipitated by the sedimentation tank, then the heavy metal reduction and replacement reagent and a heavy metal decomplexation and replacement reagent are added to reprecipitate the wastewater, a heavy metal capturing agent is added, the PH value of the wastewater is adjusted at the same time, the wastewater is precipitated for the last time, and finally, an active carbon filter is used for filtering. The wastewater treatment process sequentially comprises three times of precipitation an