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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 art, and provides a method with small impact on the environment, simple and convenient operation, low treatment cost, stable operation, Reactor device with good effect and no secondary pollution

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

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Embodiment 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 area 22 sequentially from the top; the The water inlet 1 communicates with the isolation layer 21, the end of the reaction medium filling area 22 communicates 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 area 22 is filled with a reaction medium system, and the reaction medium system includes zero-valent iron and a filling medium, and the two are uniformly mixed, and the filling medium is activated carbon, quartz sand, zeolite, montmorillonite One or more; the mass ratio of zero-valent iron to filling medium in the reaction medium system is 1-3:18-20.

[0050] Specifically, ...

Embodiment 2

[0058] A method for rapidly degrading azo wastewater, comprising the steps of:

[0059] Step 1: Adjust the pH value of the water body of the azo dye to be treated to 3.0-7.0, and no adjustment is required if the pH value of the water body is satisfactory;

[0060] Step 2: Pass the water body of azo dye into the equipment of Example 1 at a uniform speed, that is, react in a magnetic reaction medium system containing zero-valent iron;

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

[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 can promote the reaction of zero-valent iron 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 fi...

Embodiment 3

[0071] A method for rapidly degrading reactive brilliant red X-3B, establishing a reactor device for rapidly degrading azo wastewater, mixing zero-valent iron with quartz sand in a certain proportion, filling it in a column, and entering water into the water inlet at the lower end, 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 it to Different concentrations (10mg / L, 5mg / L, 3mg / L), and then configure buffer solutions with different pH (4, 5, 6), and finally, adjust the pH with 0.1mol / L NaOH or HCl solution.

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

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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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