Treatment process for high-concentration ammonia-nitrogen wastewater

Abstract

The invention discloses a treatment process for high-concentration ammonia-nitrogen wastewater. The treatment process comprises the following steps: pumping high ammonia-nitrogen wastewater of a workshop into a sewage collecting tank, detecting ammonia-nitrogen indicators of the wastewater, and diluting with tap water to regulate the ammonia-nitrogen value of the high ammonia-nitrogen wastewater to be in a proper range according to the detected indicators; pumping the high ammonia-nitrogen wastewater in the collecting tank into a micro-electrolytic cell, adding hydrochloric acid to regulate the pH value, and aerating in the micro-electrolytic cell; after the aerating is ended, pumping the wastewater into a coagulation reaction tank, adding trace amounts of polymeric aluminium and polyacrylamide solutions with stirring, enabling the wastewater after the coagulation reaction to overflow into a coagulating precipitating tank for precipitation, and enabling supernatant to overflow into a breakpoint chlorinating tank; under a stirring condition, slowly adding a sodium hypochlorite solution into the breakpoint chlorinating tank, and performing an oxidizing reaction. According to the treatment process for the ammonia-nitrogen wastewater, provided by the invention, the application range of the method for treating the ammonia-nitrogen wastewater is remarkably expanded; the using amount of sodium hypochlorite and the treatment cost are greatly reduced; the efficiency of treating the high-concentration ammonia-nitrogen wastewater is obviously improved.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to a treatment process for high-concentration ammonia nitrogen wastewater. Background technique [0002] Micro-electrolysis sewage treatment technology is a new type of water treatment technology that combines the traditional adsorption process with electrochemical process. An electrochemical technology for wastewater. Under certain conditions, a large amount of new ecological [H] and Fe are produced after the wastewater undergoes micro-electrolysis. 2 +, has high chemical activity, can undergo oxidation-reduction reactions with many components in wastewater, destroy the molecular structure of some organic substances, break the double bonds of some unsaturated chromophoric groups in wastewater, and make hair color The color is removed by destroying the group; at the same time, some substances that are difficult to biodegrade can be transformed into substances that are easy to bioch...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to address the deficiencies of the prior art, and now provides a solution to the drawbacks of the existing breakpoint chlorination process in the process of treating ammonia nitrogen wastewater, greatly reducing the amount of sodium hypochlorite used and the cost of treatment, for high The treatment efficiency of concentrated ammonia nitrogen wastewater has been significantly improved