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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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  • 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 technical problem that the traditional foam flotation method has a low CODcr removal rate in surfactant wastewater, and makes the wastewater The water quality after purification can meet the national discharge standard

Method used

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  • Treatment method for surfactant-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0028] SDBS is an anionic surfactant, which is often used in industrial production and daily life due to its advantages of good foaming, stable performance, and low price, and it is a biodegradable substance. Its wide use has caused serious damage to the water environment. pollution.

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

[0030] SDBS is an anionic surfactant that makes the wastewater negatively charged, and adsorbing material particles with positively charged surfaces are added to the process (for example, the isoelectric point of calcium carbonate is pH 9.5, so it is positively charged when the pH value is...

Embodiment 2

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

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

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

[0035] SDS is an anionic surfactant that makes wastewater negatively charged. Adsorbent particles with positively charged surfaces are added to the process (for example, the isoelectric point pH of calcium carbonate is 9.5, so it is positively charged when the pH value is lower than 9.5). Add 3000 mesh calcium carbonate particles into the bubbling device at 0.5g / L, use sodium ...

Embodiment 3

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

[0038] NPEO is a nonionic surfactant that, when released into the environment, rapidly decomposes nonylphenol (NP), an environmental hormone. NP can simulate estrogen, affect the sexual development of organisms, interfere with the endocrine of organisms, and have toxicity 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 and stir it in a 1000 mL beaker to fully dissolve it, pour the solution into the sump, take a certain amount of tap water in the sump, and make a 0.5% NPEO solution by mass fraction, mix it evenly Reserved as simulated ...

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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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