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

A combined process and wastewater technology, applied in water/sewage treatment, chemical instruments and methods, neutralized water/sewage treatment, etc., can solve problems such as easy termination, high CODcr, high concentration, etc., to improve treatment efficiency and degradation efficiency , the effect of broad application prospects

Active Publication Date: 2017-06-13
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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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 trea

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

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Embodiment Construction

[0029] The CODcr of the 6-nitrate wastewater measured by the potassium dichromate method is 18873mg / L, and the chromaticity of the wastewater is determined to be 2600 to 3000 times by the dilution factor method. It can be seen that the wastewater is the same as the general organic dye wastewater, with high chromaticity and Difficult to biodegradable characteristics.

[0030] 1. Pretreatment of 6-nitrate wastewater

[0031] Use calcium carbide slag to adjust the above 6-nitrate wastewater to pH 6-7, add 25-30g / L polyaluminum chloride and 10-20g / L cetyl under the condition of stirring speed of 200-300r / min Trimethylammonium bromide pretreated the 6-nitrate wastewater and carried out suction filtration. The CODcr value of the treated wastewater was measured to be 3856.6 mg / L by the potassium dichromate method.

[0032] 2. Further treatment of 6-nitrate wastewater by electrocatalytic oxidation

[0033] (1) Substrate pretreatment

[0034]Grind the cut titanium plate with 320-mes...

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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 ...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F101/30
CPCC02F1/46109C02F1/463C02F1/4672C02F1/5236C02F1/56C02F1/66C02F9/00C02F2001/46142C02F2101/30
Inventor 熊伟冯岐贾振福刘德蓉任勇何芳袁涛陈秋林
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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