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Treatment method of refractory organic wastewater

A technology of organic wastewater and treatment methods, which is applied in the directions of oxidation water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., which can solve the difficulty in realizing the recycling of catalysts and the large amount of iron sludge produced , inconvenient transportation and storage, etc., to avoid the effect of complicated preparation process, large specific surface area, and rich pore structure

Active Publication Date: 2018-01-09
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional Fenton oxidation technology mainly generates OH free radicals by adding ferrous ions and hydrogen peroxide to the wastewater to achieve the degradation of organic matter, but there are currently the following problems: (1) H 2 o 2 Poor stability, inconvenient transportation and storage; (2) Fenton method adapts to a narrow pH range, produces a large amount of iron sludge, and is difficult to realize the recycling of catalysts
However, the electro-Fenton method requires an external current, and a large amount of inorganic salt is required as an electrolyte in the system, which is not suitable for sewage with low conductivity; the photo-Fenton method requires high energy and high cost; the microbial fuel cell process needs to solve microbial nutrition Substance supply and biological sludge treatment issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]A method for treating refractory organic waste water, the treatment method comprises: collecting refractory organic waste water, adding aluminum-carbon nanotube-iron tetroxide composite particles into the waste water, and the aluminum-carbon nanotube-iron tetroxide The amount of iron complex particles added to the mass ratio of COD in the wastewater is 10:1, and the pH value of the wastewater is adjusted to 1.5 by using sodium hydroxide, and the reaction is stirred under the condition of introducing oxygen. The volume ratio of the oxygen to the wastewater is 100:1, the reaction temperature is 10°C, the reaction time is 1h, the stirring speed is 150r / min, after the reaction is completed, the pH value of the mixed solution is adjusted to 6, the solid-liquid separation is performed, and the supernatant is treated water.

[0029] Wherein, the aluminum-carbon nanotube-iron tetroxide composite particles are prepared by the following method:

[0030] S1. Preparation of carbon ...

Embodiment 2

[0033] A method for treating refractory organic waste water, the treatment method comprises: collecting refractory organic waste water, adding aluminum-carbon nanotube-iron tetroxide composite particles into the waste water, and the aluminum-carbon nanotube-iron tetroxide The mass ratio of the amount of iron complex particles added to the COD in the wastewater is 50:1, and the pH value of the wastewater is adjusted to 3 by using sulfuric acid, and the reaction is stirred under the condition of introducing oxygen, and the volume ratio of the oxygen to the wastewater is 300. : 1, the temperature of the reaction is 40 ° C, the reaction time is 4h, the speed of the stirring is 300r / min, after the reaction is completed, the pH value of the mixed solution is adjusted to 9, solid-liquid separation, and the supernatant is treated of water.

[0034] Wherein, the aluminum-carbon nanotube-iron tetroxide composite particles are prepared by the following method:

[0035] S1. Preparation o...

Embodiment 3

[0038] A method for treating refractory organic waste water, the treatment method comprises: collecting refractory organic waste water, adding aluminum-carbon nanotube-iron tetroxide composite particles into the waste water, and the aluminum-carbon nanotube-iron tetroxide The mass ratio of the amount of iron complex particles added to the COD in the waste water is 38:1, the pH value of the waste water is adjusted to 2 by using sodium hydroxide, and the reaction is stirred under the condition of introducing oxygen. The volume ratio of the oxygen to the waste water is 170:1, the temperature of the reaction is 22°C, the reaction time is 2h, the stirring speed is 200r / min, after the reaction is completed, the pH value of the mixed solution is adjusted to 6.5, the solid-liquid separation is performed, and the supernatant is treated water.

[0039] Wherein, the aluminum-carbon nanotube-iron tetroxide composite particles are prepared by the following method:

[0040] S1. Preparation...

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Abstract

The invention discloses a treatment method of refractory organic wastewater. The treatment method comprises the following steps: collecting the refractory organic wastewater, and adding aluminum-carbon nanotube-ferroferric oxide compound particles into the wastewater; adjusting a pH value of the wastewater to acidity and stirring and reacting under the condition of introducing oxygen; after the reaction is finished, adjusting the pH value of a mixed solution to 6 to 9 and carrying out solid-liquid separation, thus obtaining supernatant, namely the treated water. The method disclosed by the invention is performed at normal pressure and normal temperature and has the advantages of mild reaction conditions and simple technology; H2O2, a catalyst and dosing equipment does not need to be added,so that the input is low; in addition, the added functional materials are environmentally friendly, so that secondary pollution is avoided; besides, the treatment time of the wastewater is short, andthe treatment effect is good, so the method is suitable for industrialized large-scale production.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a treatment method for refractory organic waste water. Background technique [0002] With the continuous development of modern industry, the number and types of toxic and refractory organic pollutants (such as aromatic ring-containing compounds, organic polymers, surfactants, etc.) entering the water body through various ways have increased sharply. It has caused serious pollution and directly threatens human health. Effective removal of toxic and refractory pollutants in wastewater is a key link in wastewater treatment. Numerous studies have shown that traditional biological treatment methods are difficult to achieve ideal treatment effects, and advanced oxidation technology using OH radicals as the main oxidant is more suitable for the treatment of refractory organic wastewater. Among them, Fenton oxidation technology has attracted extensive attention in the treatment...

Claims

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Application Information

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IPC IPC(8): B01J23/745C02F1/52C02F1/72C02F101/30
Inventor 刘咏杨照龚小波谭妮王真然
Owner SICHUAN NORMAL UNIVERSITY
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