Method for treating 6-nitrate wastewater by aid of electrolysis joint processes

Abstract

The invention discloses a method for treating 6-nitrate wastewater by the aid of electrolysis joint processes. The method includes regulating a pH (potential of hydrogen) value of the 6-nitrate wastewater until the pH value is 6-7; adding polyaluminum chloride and hexadecyl trimethyl ammonium bromide into the 6-nitrate wastewater treating and filtering the 6-nitrate wastewater; further carrying out electro-catalytic oxidation treatment; carrying out joint electro-coagulation and peroxymonosulfate (potassium peroxymonosulfate sulfate) treatment. The method has the advantages that the CODcr (chemical oxygen demand) value of the 6-nitrate wastewater treated by the aid of the method can be reduced from the original 18873 mg / L and reaches 297 mg / L, the color scale of the 6-nitrate wastewater treated by the aid of the method can be reduced from the original 2600-3000 times and reaches 50 times, and the treatment efficiency can be greatly enhanced.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating 6-nitrate wastewater based on an electrolysis combined process. Background technique [0002] 6-Nitrate wastewater is organic dye intermediate wastewater with complex components and high concentration, especially containing -NH 2 and-HSO 3 Refractory substances such as aminoaromatic sulfonic acid have the characteristics of high CODcr (18000-20000mg / L), high chroma (up to thousands or tens of thousands), strong dispersion, variability, complexity and difficulty in biochemical degradation. serious threats to the environment and ecology. Therefore, it is of great practical significance to understand the principle of advanced treatment of this kind of organic wastewater and improve the traditional organic wastewater treatment method to protect the regional environment and ensure the long-term stable development of chemical enterprises. [0003] There are ...

AI Technical Summary

Problems solved by technology

[0002] 6-Nitrate wastewater is organic dye intermediate wastewater with complex components and high concentration, especially containing -NH 2 and-HSO 3 Refractory substances such as aminoaromatic sulfonic acid have the characteristics of high CODcr (18000-20000mg / L), high chroma (up to thousands or tens of thousands), strong dispersion, variability, complexity and difficulty in biochemical degradation. Serious threats to the environment and ecology

[0003] There are some shortcomings in the current 6-nitrate wastewater treatment technology and process, such as using metal ions (Fe 2+ , Mn 2+ 、Co 2 + 、Cu 2+ ) to activate persulfate (persulfate) to generate SO 4 - (2.5V-3.1V) Although the reaction rate is fast when treating organic wastewater, the reaction is easily terminated, that is, the contact time with organic matter is short, and the degradation efficiency of organic matter is low; the electrode materials with a single coating have low oxygen evolution potential (Very prone to side reactions) or defects with low electrode stability

Images