The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2025
Filed:
Sep. 13, 2024
Nanchang Hangkong University, Nanchang, CN;
Nanchang Hangkong University, Nanchang, CN;
Abstract
A method for treating electroplating wastewater includes: performing a cyanide primary treatment on to-be-treated cyanide containing wastewater in a treatment tank by using a chlor-alkali process; performing a cyanide secondary treatment on the wastewater after cyanide primary treatment by controlling an addictive amount of chromium containing wastewater and adding acid liquor for adjusting a pH value of the wastewater to a preset acidity range; performing a hexavalent chromium reduction treatment on the wastewater after the cyanide secondary treatment by adding acid liquor for adjusting a pH value of the wastewater to a preset acidity range and adding a sulfite solution; and performing neutralization flocculation, solid-liquid separation, and sand filtration on the wastewater after the hexavalent chromium reduction treatment sequentially to obtain dischargeable water meeting a preset standard. The method can effectively remove harmful substances such as cyanide, chromium, copper and zinc, to thereby reduce environmental pollution and save treatment costs.