Treatment method for surfactant-containing wastewater

A surfactant and wastewater treatment technology, applied in water/sewage treatment, water/sewage multi-stage treatment, neutralized water/sewage treatment, etc., can solve the problem of low CODcr removal rate, and is conducive to large-scale popularization and application , to avoid secondary pollution, the effect of low operating costs

Inactive Publication Date: 2018-04-20
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a method for the treatment of wastewater containing surfactants, which solves the tech

Method used

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  • Treatment method for surfactant-containing wastewater

Examples

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Example Embodiment

[0027] Example 1: Take the treatment of wastewater containing sodium dodecylbenzene sulfonate (SDBS) as an example.

[0028] SDBS is an anionic surfactant. It is often used in industrial production and daily life due to its good foaming, stable performance and low price. It is a refractory biodegradable substance. Its wide use has caused serious problems in the water environment. Pollution.

[0029] Weigh a certain amount of SDBS in a 1000 mL beaker and stir to fully dissolve it, pour the solution into the sump, take a certain amount of tap water in the sump, and mix it into a 0.5% SDBS solution. Reserve it as simulated wastewater for future use.

[0030] SDBS is an anionic surfactant that makes the wastewater have a negative charge. The adsorption material particles with a positive charge on the surface are added in the process (for example, the isoelectric point of calcium carbonate has a pH of 9.5, so it is positively charged when the pH is lower than 9.5). Add 3000 mesh calcium...

Example Embodiment

[0032] Example 2: Take the treatment of wastewater containing sodium dodecyl sulfate (SDS) as an example.

[0033] SDS is an anionic surfactant. Because of its good decontamination, emulsification, and foaming properties, it is widely used in the detergent and textile industries, but it is slightly toxic to the human body.

[0034] Weigh a certain amount of SDS in a 1000 mL beaker and stir to fully dissolve it, pour the solution into the sump, take a certain amount of tap water in the sump, and mix it with a 0.5% SDS solution. Reserve it as simulated wastewater for future use.

[0035] SDS is an anionic surfactant that makes the wastewater have a negative charge. Add positively charged adsorption material particles in the process (for example, the isoelectric point of calcium carbonate has a pH of 9.5, so it is positively charged when the pH is lower than 9.5). Add 3000 mesh calcium carbonate particles at 0.5g / L into the bubbling device, adjust the pH of the wastewater system to 8 w...

Example Embodiment

[0037] Example 3: Take the treatment of wastewater containing nonylphenol polyoxyethylene ether (NPEO) as an example.

[0038] NPEO is a non-ionic surfactant, which will quickly decompose an environmental hormone nonylphenol (NP) when discharged into the environment. NP can mimic estrogen, affect the sexual development of organisms, and interfere with the endocrine of organisms, and is toxic to the reproductive system. At the same time, nonylphenol (NP) can continuously accumulate in organisms through the food chain, so studies have shown that even if the emission concentration is very low, it is extremely harmful. Therefore, NPEO is not suitable for oxidative degradation treatment and should be separated and recycled.

[0039] Weigh a certain amount of NPEO in a 1000 mL beaker and stir to fully dissolve it, pour the solution into the sump, take a certain amount of tap water in the sump, and mix it with a 0.5% NPEO solution. Reserve it as simulated wastewater for future use.

[00...

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Abstract

The invention discloses a treatment method for surfactant-containing wastewater. The treatment method comprises the following steps: collecting the surfactant-containing wastewater, and carrying out detection; adding proper adsorbing material particles, and allowing the adsorbing material particles to adsorb the surfactant; and through a foam flotation process, allowing the surface of a liquid togenerate a large number of bubbles by utilization of a bubbling device, allowing the adsorbing material particles attached with a target surfactant to float with the bubbles, and removing surface foamthrough foam separation so as to achieve the purpose of reducing the concentration of the surfactant in a water body. The treatment process provided by the invention has the advantages of simple device, simple and convenient operation, cheap and easily-available used materials, low cost, good treatment effect, etc.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for treating wastewater containing surfactants. technical background [0002] Surfactant refers to a substance that has fixed hydrophilic and lipophilic groups, can be aligned on the surface of the solution, and can significantly reduce the surface tension. Because of its special physical and chemical characteristics such as wetting or anti-sticking, emulsification or demulsification, foaming or defoaming, solubilization, dispersion, washing, anticorrosion, antistatic, etc., it is widely used in various fields of national production and life. However, surfactant-containing wastewater will produce a large amount of foam that is not easy to disappear on the water surface, resulting in a reduction in the reoxygenation rate and oxygenation degree in the water, and making the water stinky. [0003] For wastewater treatment technologies containing sur...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/30
CPCC02F1/24C02F1/281C02F1/283C02F1/285C02F1/66C02F7/00C02F9/00C02F2101/30C02F2303/16
Inventor 邹伟颜杰陈炯杨虎李斌龙凤杜芳琼
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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