Electroplating wastewater treatment system

Abstract

This invention relates to an electroplating wastewater treatment system. The system comprises, sequentially along the water flow direction, a pretreatment tank, an electrochemical tank, a flocculation tank, an adsorption tank, and a clear water tank. The pretreatment tank is divided into a coarse filtration tank and a pH adjustment tank by a baffle plate. The electrochemical tank includes a cathode plate, an anode plate, and an electrochemical workstation. The adsorption tank is filled with an adsorbent layer and is equipped with a backwashing device. Modified carbon fiber is used for both the anode plate and the adsorbent layer. This invention provides an electroplating wastewater treatment system where the pretreatment tank removes large suspended solids and adjusts the pH to neutral. In the electrochemical tank, modified carbon fiber is used as the anode plate to oxidize recalcitrant organic pollutants in the water. After passing through the flocculation tank, flocs are formed. Clear water is filtered into the adsorption tank for further adsorption and removal of heavy metal ions. The adsorption tank is equipped with a backwashing device to continuously rinse the adsorption layer. The effluent quality after the second rinsing generally meets national discharge standards.

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