Electroplating waste water treatment method

US9708202B2 · kind B2 · utility

Assignees

• Nanjing University · CN
• Nanjing University Yancheng Environmental Protection Technology and Engineering Research Institute · CN

Inventors

• Aimin Li · Nanjing, CN
• Lichun Fu · 安丰镇, CN
• Fuqiang Liu · State College, US
• Qing Zhou · Tangxia, CN
• Jianjun Dai · 安丰镇, CN
• Zhaoyang Lu · Lo Wu, CN
• Yan Li · 安丰镇, CN
• Chendong Shuang · Nanjing, CN
• Jinnan Wang · Nanjing, CN
• Weiwei Zhao · Wuxi, CN

Key dates

• Filing date: Mar 27, 2013
• Grant date: Jul 18, 2017
• Expiry date: Mar 19, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W10/10
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

An efficient combined advanced treatment method of electroplating wastewater is disclosed, which belongs to the technical field of electroplating wastewater treatment. The method includes: after pretreatments including cyanide breaking, dechromization and coagulating sedimentation, introducing the electroplating wastewater to a contact oxidation tank for biochemical treatment, and settling the effluent from the contact oxidation tank down in an inclined pipe of a secondary sedimentation tank to realize the separation of the sludge from water; charging the effluent to a coagulating sedimentation tank, and undergoing coagulating sedimentation with the aid of a flocculant and a coagulant aid added; feeding the effluent, as an influent, to a resin adsorption tank for adsorption with a magnetic resin; and after passing through a filter, flowing the effluent after adsorption to a fixed bed resin adsorption unit, so as to realize the discharge up to standard and recycle of the effluent.