Method and apparatus for rapidly degrading azo wastewater

A rapid degradation and azo technology, applied in chemical instruments and methods, textile industry wastewater treatment, water pollutants, etc., can solve the problem of low treatment efficiency, achieve good effect, convenient operation, and mild reaction conditions

Inactive Publication Date: 2020-01-03
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides a method for rapidly degrading azo wastewater, overcomes the defects of low comprehensive treatment efficiency in the prior a

Method used

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  • Method and apparatus for rapidly degrading azo wastewater
  • Method and apparatus for rapidly degrading azo wastewater
  • Method and apparatus for rapidly degrading azo wastewater

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0046] Example 1

[0047] See Figure 1-4 , The present invention provides a technical solution:

[0048] A reactor device for rapidly degrading azo wastewater, comprising a water inlet 1, a reactor 2, a magnetic field generator 3, and a water outlet 4; the reactor 2 includes an isolation layer 21 and a reaction medium filling zone 22 in order from the top; The water inlet 1 is in communication with the isolation layer 21, the end of the reaction medium filling zone 22 is in communication with the water outlet 4, and the outer wall of the reactor 2 has a magnetic field generator 3.

[0049] Specifically, the reaction medium filling zone 22 is filled with a reaction medium system. The reaction medium system includes zero-valent iron and a filling medium, which are uniformly mixed. The filling medium is activated carbon, quartz sand, zeolite, and montmorillonite. One or more; the mass ratio of zero-valent iron to the filling medium in the reaction medium system is 1 to 3: 18 to 20.

...

Example Embodiment

[0057] Example 2

[0058] A method for rapidly degrading azo wastewater, including the following steps:

[0059] Step 1: Adjust the pH of the water body of the azo dye to be treated to 3.0~7.0, and no adjustment is needed if the pH of the water body is satisfied;

[0060] Step 2: Pass the water of the azo dye into the device of Example 1 at a constant speed, that is, a magnetic reaction medium system containing zero-valent iron for reaction;

[0061] Step 3: Adjust the pH of the water body to neutral and discharge;

[0062] The reaction medium system includes zero-valent iron and a filling medium, which are uniformly mixed, and the filling medium is one or more of activated carbon, quartz sand, zeolite, and montmorillonite.

[0063] Under the action of the magnetic field, it promotes the zero-valent iron reaction in the reaction medium system. The magnetic field promotes the corrosion of zero-valent iron because the zero-valent iron is magnetized in the external magnetic field, which ge...

Example Embodiment

[0070] Example 3

[0071] A method for rapidly degrading Reactive Brilliant Red X-3B is to establish a reactor device for rapidly degrading azo wastewater. After mixing zero-valent iron with quartz sand in a certain proportion, fill the column with water at the lower inlet. Water from the upper water outlet. Before the experiment starts, first, turn on the peristaltic pump (preheat about 30 minutes in advance), adjust the speed to 1r / min as needed, and then configure 1g / L Reactive Brilliant Red X-3B reaction solution and dilute to Different concentrations (10mg / L, 5mg / L, 3mg / L), and then configure different pH (4, 5, 6) buffer solutions, and finally, use 0.1mol / L NaOH or HCl solution to adjust the pH.

[0072] Such as Figure 5 In this example, the effect of pH on the removal of reactive brilliant red X-3B by magnetic field-enhanced zero-valent iron was studied, and the pH was 4-6. Figure 5 a is Reactive Brilliant Red X-3B at a concentration of 3mg / L, [Zerovalent Iron (abbreviated...

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Abstract

The invention discloses an apparatus for rapidly degrading azo wastewater. The apparatus comprises a water inlet, a single-layer or multi-layer reactor, a magnetic field generator, and a water outlet,wherein the reactor comprises an isolation layer and a reaction medium filling zone in order from the top, the reaction medium filling zone is filled with a reaction medium system, the reaction medium system comprises zero-valent iron and a filling medium which are uniformly mixed, the filling medium is one or more of activated carbon, quartz sand, zeolite, and montmorillonite, and a mass ratio of zero-valent iron to the filling medium in the reaction medium system is 1-3:18-20. The water body of an azo dye with a pH value adjusted to 3.0-7.0 is introduced into the apparatus, and the water body is effectively treated under the action of the magnetic field strengthening technology. The reaction conditions are mild, the energy consumption is low, a reaction can be carried out at normal temperature and normal pressure, and no energy consumptions such as heating, refrigeration and pressurization exists. The method and apparatus have low treatment cost, stable operation, and high wastewater treatment efficiency.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a method and a device for rapidly degrading pollutants in wastewater, in particular to a method and a device for rapidly degrading azo wastewater. Background technique [0002] Printing and dyeing wastewater is the wastewater generated from the processing and production of textile products such as cotton, wool, and chemical fiber. It is mainly generated in the four processes of pretreatment, dyeing, printing, and finishing. According to different processes, printing and dyeing wastewater can be divided into desizing wastewater, cooking wastewater, bleaching wastewater, mercerizing wastewater, dyeing wastewater, printing wastewater, finishing process wastewater, alkali reduction wastewater, etc., while dye wastewater generated in the dyeing process is an environmental One of the important sources of pollution. Among them, the most used dyes are azo dyes (such as reacti...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F103/30C02F101/30
CPCC02F1/48C02F1/66C02F1/705C02F2101/308C02F2103/30
Inventor 梁丽萍窦文龙孟旭
Owner SHAOXING UNIVERSITY
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