Method for treating phenolic wastewater by using three-dimensional electrode

Abstract

The invention relates to a method for treating phenolic wastewater by using a three-dimensional electrode. The method comprises the following steps: (2) putting 250ml of a 500mg / L phenolic wastewater sample with the COD (Chemical Oxygen Demand) of 1784mg / L into a three-dimensional electrode reactor; electrifying and treating the phenolic wastewater by using an electrochemical oxidation method; and (2) adding electrolyte with the mass concentration of 1g / L-10g / L into the phenolic wastewater; carrying out aeration treatment to sufficiently mix the phenolic wastewater with the electrolyte, adding sodium carbonate into the phenolic wastewater to adjust the PH (Potential of Hydrogen) value to 2-6, and electrolyzing for 120 minutes under the condition that electrode voltage is 5V-8V. According to the method provided by the invention, a regular type third electrode is adopted so as to eliminate a layering phenomenon of a traditional heaped three-dimensional electrode and reduce short-circuit current; the phenol treatment effect is greatly better than that of the traditional heaped three-dimensional electrode and the method has profound and lasting positive meanings of treating the phenolic wastewater.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating phenol wastewater by using a three-dimensional electrode. Background technique [0002] In the process of industrial production, a lot of industrial wastewater will be produced. Industrial wastewater refers to the wastewater, sewage and waste liquid produced in the process of industrial production, which contains industrial production materials, intermediate products and products lost with water, as well as waste water produced in the production process. pollutants. With the rapid development of industry, the types and quantities of wastewater are increasing rapidly, and the pollution of water bodies is becoming more and more extensive and serious, threatening human health and safety. Therefore, the treatment of industrial wastewater is particularly important for protecting the environment. At present, physical, chemical, and biological methods are usual...

AI Technical Summary

Problems solved by technology

However, the effect of the traditional three-dimensional electrode treatment process for phenol wastewater is not ideal. The traditional phenol removal rate is only about 60-70%. Randomly piled between the anode and the cathode, the particle electrode is under the long-term erosion of water flow and air flow, and the conductive particles and insulating particles are gradually stratified, resulting in an increase in short-circuit current, a decrease in mass transfer rate, and low utilization.

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