Method for processing organic wastewater by electro-fenton

Abstract

The invention relates to a method for processing an organic wastewater by electro-fenton. The method comprises the following specific steps: (1) adding enough activated carbon powder to the wastewater, wherein the adding amount of the activated carbon powder accounts for 0.7wt%-1.1wt% of the wastewater; (2) adsorbing a lot of impurities in water by the activated carbon powder, filtering the wastewater and injecting into an ultrasonic reactor; (3) carrying out ultrasonic crushing reaction, wherein the sound energy density of the ultrasonic wave is 0.1-0.3w / m<3>; (4) after reacting for 20-40 minutes, feeding the wastewater into an electrolytic cell, and adding mineralized refuse and an H2O2 solution to the electrolytic cell, wherein an anode electrode of the electrolytic cell is an iron electrode and a cathode electrode is a graphite electrode; connecting current of the electrolytic cell, and lastingly stirring in the overall process; and (5) after 2-4 hours, participating after reaction is ended, thus achieving solid-liquid separation, so as to finish wastewater treatment. The ultrasonic crushing reaction is utilized as earlier stage processing, and then the mineralized refuse is utilized to participate into electrolytic sewage purification, so that the defects that iron ions are difficult to remove and the removal efficiency of pollutants is low in an existing fenton technology are solved.

Description

technical field [0001] The invention relates to a method for treating organic wastewater by Fenton with the participation of mineralized garbage, in particular to a method for treating organic wastewater by electric Fenton. Background technique [0002] In the treatment of water resources and environment, wastewater can be treated by ultrasonic waves. The cavitation effect of ultrasonic waves provides the possibility of degrading harmful organic substances in water, so that the purpose of ultrasonic sewage treatment can be realized. In the process of sewage treatment, ultrasonic cavitation has a strong ability to degrade organic matter, and the degradation speed is very fast. The high energy generated by the collapse of ultrasonic cavitation bubbles is enough to break chemical bonds, and the collapse of cavitation bubbles produces hydroxyl groups ( Oh - ) and hydrogen radicals (H + ), and the oxidation reaction with organic matter can convert harmful organic matter in wate...

AI Technical Summary

Problems solved by technology

[0016] In view of the above documents, the present invention provides a method that can use ultrasonic crushing reaction as a pre-treatment, and then use mineralized waste to participate in electrolytic sewage purification, thereby overcoming the shortcomings of difficult removal of iron ions and low efficiency of pollutant removal in the existing Fenton technology. A kind of electro-fenton method for treating organic wastewater