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Method for fast degrading dyestuff waste water under condition of low iron feeding quantity

A rapid degradation technology for dye wastewater, applied in chemical instruments and methods, textile industry wastewater treatment, water pollutants, etc., can solve the problems of low treatment efficiency, difficult to remove chroma, high COD, etc., and achieve improved removal efficiency and removal effect Clear, value-enhancing effects

Inactive Publication Date: 2017-05-10
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problem that chroma is difficult to remove in the process of printing and dyeing wastewater treatment, and the COD in the secondary effluent of wastewater is still high, and the problem of low treatment efficiency and secondary pollution during the treatment process

Method used

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  • Method for fast degrading dyestuff waste water under condition of low iron feeding quantity
  • Method for fast degrading dyestuff waste water under condition of low iron feeding quantity
  • Method for fast degrading dyestuff waste water under condition of low iron feeding quantity

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A method for quickly and effectively removing dye wastewater with low iron dosage is to place an external magnetic field at the bottom of the complete mixing reactor, add 10.0 g / L of 1 micron iron powder to the dye wastewater with a COD of 1500 mg / L, pH=3.0 , The magnetic field strength is about 30mT. When the magnetic field is placed outside, the iron powder can remove more than 99% of the color of the dye wastewater within 10 hours.

[0038] The result is as figure 1 (No. 2): the left picture of No. 2 is the chromaticity before treatment, and the right picture of No. 2 is the chromaticity after treatment). Basic Example 2:

Embodiment 2

[0039] A method for quickly and effectively removing dye wastewater with low iron dosage is to place an external magnetic field at the bottom of the complete mixing reactor, add 10.0 g / L of 1 micron iron powder to the dye wastewater with a COD of 250 mg / L, pH=3.0 , The magnetic field strength is about 30mT. When the magnetic field is placed outside, the iron powder can remove more than 90% of the chroma of the dye wastewater within 10 hours. see details figure 1 (No. 1): The left picture of No. 1 is the chromaticity before treatment, and the right picture of No. 1 is the chromaticity after treatment.

Embodiment 3

[0041] A method for quickly and effectively removing dye wastewater with low iron dosage is to place an external magnetic field at the bottom of the complete mixing reactor, add 10.0 g / L of 1 micron iron powder to the dye wastewater with a COD of 1500 mg / L, pH=3.0 , The magnetic field strength is about 30mT. When the magnetic field is external, the iron powder can remove more than 80% of the COD of the dye wastewater within 10 hours. see details figure 2 Shown: (3 is before removal; 4 is after removal).

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Abstract

The invention discloses a method for fast degrading dyestuff waste water under the condition of low iron feeding quantity, belongs to the technical field of water treatment, and relates to a water and wastewater treatment method. In order to solve the problems of great chromaticity and COD degradation difficulty of the existing dyestuff wastewater treatment method, a novel method for fast reducing the chromaticity and the COD in the dyestuff waste water in a magnetic field and iron powder cooperated mode is provided. By using the method, the chromaticity removal rate and the COD removal rate of the dyestuff wastewater are improved; the used iron powder is cheap and can be easily obtained; secondary pollution cannot be generated; the treatment cost of the dyestuff wastewater is reduced; the retention time of the dyestuff wastewater is also shortened.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of water treatment, and relates to a water and waste water treatment method, in particular to a method for rapidly degrading dye waste water under low iron dosage. [0003] Background technique: [0004] With the development of industrialization, the phenomenon of printing and dyeing wastewater polluting water bodies is becoming more and more serious. Its main characteristics are: large water volume, high concentration of organic pollutants, deep color, large changes in alkalinity and pH value, and drastic changes in water quality. Due to different dyes, auxiliaries, and fabric dyeing and finishing requirements, the pH value and COD of printing and dyeing wastewater Cr 、BOD 5 Concentration, color, etc. are also different, but one of their common characteristics is that m(BOD 5 ) / m(COD Cr ) values ​​are very low, generally around 0.2, and their biochemical properties are poor; another common featur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/48C02F101/30C02F103/30
CPCC02F1/48C02F2101/308C02F2103/30
Inventor 梁丽萍孟旭
Owner SHAOXING UNIVERSITY