Patent ID: 9708202
Date: 2017-07-18
CPC Classifications: C02F,Y02W

Claim:
1. An efficient combined advanced treatment method of electroplating wastewater, comprising: (1) subjecting the electroplating wastewater to pretreatments including cyanide breaking, dechromisation and coagulating sedimentation; introducing the pretreated electroplating wastewater to a contact oxidation tank for biochemical treatment; settling an effluent from the contact oxidation tank in a secondary sedimentation tank to form a sludge and a first liquid, wherein, in the pretreated electroplating wastewater, concentrations of Cu (2) feeding the first liquid from the step (1) to a coagulating sedimentation tank, and adding a flocculant and a coagulant aid into the first liquid to remove suspended solids, Cu (3) mixing the second liquid from the step (2) with a magnetic resin to form a mixture; separating the magnetic resin from the mixture to obtain a third liquid; and (4) filtering the third liquid from the step (3) using a filter and feeding the filtered third liquid to a fixed bed resin adsorption unit, wherein an effluent from the fixed bed resin adsorption unit is discharged or subject to further treatments.