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:
Sep. 25, 2012
Filed:
Jul. 25, 2008
Hongqiang Ren, Nanjing, CN;
Yunjun Yang, Nanjing, CN;
Lili Ding, Nanjing, CN;
Xiaolei Shi, Nanjing, CN;
Hongqiang Ren, Nanjing, CN;
Yunjun Yang, Nanjing, CN;
Lili Ding, Nanjing, CN;
Xiaolei Shi, Nanjing, CN;
Nanjing University, , CN;
Abstract
A new method that integrates electrochemical oxidation and flocculation processes for removing ammonia nitrogen in coking wastewater is disclosed in this invention. It comprises steps as follow: first, adjusting the PH of coking wastewater and adding Feinto the wastewater; then leading the wastewater containing Fethrough such 5 areas as pulsed high-voltage discharge oxidation area, pulsed high-frequency DC electrolytic oxidation area, microbubble oxidation area, flocculation area and precipitation area in succession. High-voltage pulse and high-frequency pulse are two different mechanisms for achieving strong oxidation. With help of both solid and liquid catalysts, these two oxidations can work synergistically. The recalcitrant organic chemicals are effectively destroyed and satisfactorily removed out of wastewater. The high-concentration coking waster pretreated with this method will meet Chinese highest discharge standard as long as the routine biochemical treatment is applied thereafter. The total investment on equipments and operation expenditure of the whole system is economically modest, which, together with its highly efficient treatment performance, ensures its extensive application in the field of wastewater treatment.