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A method for targeted capture sewage treatment

A sewage treatment method and targeted capture technology, which can be used in water/sewage treatment, water/sewage multi-stage treatment, neutralized water/sewage treatment, etc. excellent effect

Inactive Publication Date: 2020-09-15
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned shortcomings existing in the existing magnetic separation sewage technology, the purpose of the present invention is to provide a targeted capture sewage treatment method to solve the technical problem that the magnetic separation sewage technology produces difficult to process solid waste

Method used

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  • A method for targeted capture sewage treatment
  • A method for targeted capture sewage treatment
  • A method for targeted capture sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: Treatment Techniques on Ground Surfaces Containing Clay Particles and Organic Matter

[0046] See the specific process figure 1 .

[0047] For most surface water, the main pollutants are solid particles and microorganisms dispersed in the water, and organic matter adsorbed or dissolved in the water. Most of these pollutions are negatively charged, and magnetic particles with positive charges on the surface should be added in the process (for example, ferric oxide is positively charged below pH 6 and negatively charged above 6, and the charge on the surface of the magnetic particles can be realized by adjusting the pH. sex). The raw water is ordinary river water with a turbidity of 200 NTU. Select 1000-mesh selected magnetite powder to activate it by adding a small amount of sulfuric acid and ammonia water. The ratio of sulfuric acid and ammonia water is 2:1, and then use magnetic separation and transmission equipment Add the magnetic and positively charged...

Embodiment 2

[0048] Example 2: Removal of polytetrafluoroethylene microparticles in polytetrafluoroethylene dispersed resin production wastewater

[0049] See the specific process figure 2 .

[0050] Fluorine-containing emulsifiers such as perfluorooctanoic acid are indispensable in the production of PTFE dispersion resins. These fluorine-containing surfactants not only have high production costs, but also cause serious harm to the environment due to their poor biocompatibility. When using membrane separation to recover PFOA in wastewater, the polytetrafluoroethylene nanoparticles remaining in the wastewater will block the membrane components, resulting in separation failure. The turbidity of the raw water is 18.9NTU. Select 1000-mesh selected magnetite powder to activate it by adding a small amount of sulfuric acid and ammonia water. The ratio of sulfuric acid and ammonia water is 0.5:1, and then use magnetic separation and transmission equipment to make it magnetic. And the magnetite ...

Embodiment 3

[0051] Example 3: Recovery process of fluorine-containing surfactant in fluorine-containing organic polymer production wastewater

[0052] See the specific process image 3 .

[0053] In the production of fluorine-containing polymerization, fluorocarbon surfactants are often used in large quantities as emulsifiers and dispersants, and most of them will be discharged with wastewater after use. These fluorine-containing surfactants not only have high production costs, but also cause serious harm to the environment due to their poor biocompatibility. Separation of fluorosurfactants using membranes is extremely costly to operate and may solve the technical problem of membrane clogging caused by residual fluoropolymer particles in wastewater. The content of perfluorooctanoic acid in tetrafluoroethylene condensed wastewater is 20ppm. The nano-ferric oxide synthesized by co-precipitation method is selected as the core, and the surface is coated with silicon dioxide. According to th...

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Abstract

The invention provides a target capture sewage treatment method. The method comprises the steps of target capture particle synthesis, mixing, two-stage magnetic separation, magnetic powder regeneration treatment, pollutant innocent treatment and the like. A wet chemistry method is used for synthesizing a target capture material capable of adsorbing and enriching specific wastewater pollutants, primary low intensity magnetic separation is used for discharging particles of the magnetic material losing magnesium due to oxidation and mechanical wear, then, the target capture material with the magnesium is dispersed into wastewater to adsorb pollutants, and a secondary high-gradient magnetic field is used for completely removing the target capture material adsorbing the pollutants; by changing a targeted group, classified separation of sewage pollutants can be achieved, and the foundation of resource utilization of pollutants in sewage is laid. The method can be implemented with low cost, sewage which is hard to treat in the prior art is subjected to thorough innocent treatment, meanwhile, a large number of ancillary facilities do not need to be built, the capital construction cost is low, and a distributed sewage treatment system can be built according to sewage distribution.

Description

technical field [0001] The invention relates to sewage treatment technology, in particular to the use of surface-modified superparamagnetic particles to absorb pollutants in wastewater, and then to remove them with a high-gradient strong magnetic field to realize sewage purification treatment. The magnetic particles adsorbed with pollutants are eluted and then Recycling of magnetic particles is achieved by using a weak magnetic field. [0002] technical background [0003] Traditional sewage treatment technology is a comprehensive application of chemical reaction, biodegradation and chemical separation technology to remove pollutants in sewage that are harmful to animals, plants and the ecological environment from water and achieve water purification. In order to realize the treatment of sewage, it is necessary to build a large number of infrastructure facilities such as pools and pumping stations. The infrastructure investment is high, and the energy consumption is high duri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/12C02F1/28C02F1/48
CPCC02F1/288C02F1/488C02F1/66C02F9/00C02F2001/007C02F2301/08C02F2303/16
Inventor 邹伟颜杰陈炯李嘉杨虎朱胜兰苏桂萍何冬梅
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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